diff --git a/CHANGELOG.md b/CHANGELOG.md
index 900a8fa..9341c44 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,10 +5,22 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [1.4.0]
+## [1.4.0] - 2021-10-30
+
+### Added
 
 - Allow specify to specify a backend for location backup
 - Global restic flags
+- Generic ENV support for backends
+
+### Changed
+
+- Install now only requires `wget`
+- Env variable for the `KEY` has been renamed from `AUTORESTIC_[BACKEND NAME]_KEY` -> `AUTORESTIC_[BACKEND NAME]_RESTIC_PASSWORD`
+
+### Fixed
+
+- Error handling during upgrade & uninstall
 
 ## [1.3.0] - 2021-10-26
 
diff --git a/cmd/uninstall.go b/cmd/uninstall.go
index 50f774c..e3e955f 100644
--- a/cmd/uninstall.go
+++ b/cmd/uninstall.go
@@ -9,12 +9,12 @@ var uninstallCmd = &cobra.Command{
 	Use:   "uninstall",
 	Short: "Uninstall restic and autorestic",
 	Run: func(cmd *cobra.Command, args []string) {
-		noRestic, _ := cmd.Flags().GetBool("no-restic")
-		bins.Uninstall(!noRestic)
+		restic, _ := cmd.Flags().GetBool("restic")
+		bins.Uninstall(restic)
 	},
 }
 
 func init() {
 	rootCmd.AddCommand(uninstallCmd)
-	uninstallCmd.Flags().Bool("no-restic", false, "do not uninstall restic.")
+	uninstallCmd.Flags().Bool("restic", false, "also uninstall restic.")
 }
diff --git a/cmd/upgrade.go b/cmd/upgrade.go
index f2a0dc7..b6bc15e 100644
--- a/cmd/upgrade.go
+++ b/cmd/upgrade.go
@@ -9,13 +9,13 @@ var upgradeCmd = &cobra.Command{
 	Use:   "upgrade",
 	Short: "Upgrade autorestic and restic",
 	Run: func(cmd *cobra.Command, args []string) {
-		noRestic, _ := cmd.Flags().GetBool("no-restic")
-		err := bins.Upgrade(!noRestic)
+		restic, _ := cmd.Flags().GetBool("restic")
+		err := bins.Upgrade(restic)
 		CheckErr(err)
 	},
 }
 
 func init() {
 	rootCmd.AddCommand(upgradeCmd)
-	upgradeCmd.Flags().Bool("no-restic", false, "also update restic")
+	upgradeCmd.Flags().Bool("restic", true, "also update restic")
 }
diff --git a/docs/markdown/backend/available.md b/docs/markdown/backend/available.md
index 88bccf0..cf692c4 100644
--- a/docs/markdown/backend/available.md
+++ b/docs/markdown/backend/available.md
@@ -4,6 +4,8 @@ In theory [all the restic backends](https://restic.readthedocs.io/en/stable/030_
 
 Those tested are the following:
 
+> ℹ️ You can also [specify the `env` variables in a config file](/backend/env) to separate them from the config file.
+
 ## Local
 
 ```yaml
diff --git a/docs/markdown/backend/env.md b/docs/markdown/backend/env.md
index 4831c13..f66784e 100644
--- a/docs/markdown/backend/env.md
+++ b/docs/markdown/backend/env.md
@@ -1,36 +1,67 @@
 # Environment
 
-> ⚠ Available since version `v1.3.0`
+> ⚠ Available since version `v1.4.0`
 
 Sometimes it's favorable not having the encryption keys in the config files.
-For that `autorestic` allows passing the backend keys as `ENV` variables, or through an env file.
+For that `autorestic` allows passing the env variables to backend password as `ENV` variables, or through an env file.
+You can also pass whatever `env` variable to restic by prefixing it with `AUTORESTIC_[BACKEND NAME]_`.
 
-The syntax for the `ENV` variables is as follows: `AUTORESTIC_[BACKEND NAME]_KEY`.
+> ℹ️ Env variables and file overwrite the config file in the following order:
+>
+> Env Variables > Env File (`.autorestic.env`) > Config file (`.autorestic.yaml`)
+
+## Env file
+
+Alternatively `autorestic` can load an env file, located next to `.autorestic.yml` called `.autorestic.env`.
+
+```
+AUTORESTIC_FOO_RESTIC_PASSWORD=secret123
+```
+
+### Example with repository password
+
+The syntax for the `ENV` variables is as follows: `AUTORESTIC_[BACKEND NAME]_RESTIC_PASSWORD`.
 
 ```yaml | autorestic.yaml
 backend:
   foo:
     type: ...
     path: ...
-    key: secret123 # => AUTORESTIC_FOO_KEY=secret123
+    key: secret123 # => AUTORESTIC_FOO_RESTIC_PASSWORD=secret123
 ```
 
-## Example
-
 This means we could remove `key: secret123` from `.autorestic.yaml` and execute as follows:
 
 ```bash
-AUTORESTIC_FOO_KEY=secret123 autorestic backup ...
+AUTORESTIC_FOO_RESTIC_PASSWORD=secret123 autorestic backup ...
 ```
 
-## Env file
+### Example with Backblaze B2
 
-Alternatively `autorestic` can load an env file, located next to `autorestic.yml` called `.autorestic.env`.
-
-```| .autorestic.env
-AUTORESTIC_FOO_KEY=secret123
+```yaml | autorestic.yaml
+backends:
+  bb:
+    type: b2
+    path: myBucket
+    key: myPassword
+    env:
+      B2_ACCOUNT_ID: 123
+      B2_ACCOUNT_KEY: 456
 ```
 
-after that you can simply use `autorestic` as your are used to.
+You could create an `.autorestic.env` or pass the following `ENV` variables to autorestic:
+
+```
+AUTORESTIC_BB_RESTIC_PASSWORD=myPassword
+AUTORESTIC_BB_B2_ACCOUNT_ID=123
+AUTORESTIC_BB_B2_ACCOUNT_KEY=456
+```
+
+```yaml | autorestic.yaml
+backends:
+  bb:
+    type: b2
+    path: myBucket
+```
 
 > :ToCPrevNext
diff --git a/docs/markdown/installation.md b/docs/markdown/installation.md
index 7f7e3fc..a6a9a2a 100644
--- a/docs/markdown/installation.md
+++ b/docs/markdown/installation.md
@@ -2,10 +2,10 @@
 
 Linux & macOS. Windows is not supported. If you have problems installing please open an issue :)
 
-Autorestic requires `curl`, `wget` and `bzip2` to be installed. For most systems these should be already installed.
+Autorestic requires `bash`, `wget` and `bzip2` to be installed. For most systems these should be already installed.
 
 ```bash
-curl -s https://raw.githubusercontent.com/CupCakeArmy/autorestic/master/install.sh | bash
+wget -qO - https://raw.githubusercontent.com/CupCakeArmy/autorestic/master/install.sh | bash
 ```
 
 ## Alternatives
diff --git a/docs/markdown/quick.md b/docs/markdown/quick.md
index 231d184..574bc03 100644
--- a/docs/markdown/quick.md
+++ b/docs/markdown/quick.md
@@ -3,7 +3,7 @@
 ## Installation
 
 ```bash
-curl -s https://raw.githubusercontent.com/CupCakeArmy/autorestic/master/install.sh | bash
+wget -qO - https://raw.githubusercontent.com/CupCakeArmy/autorestic/master/install.sh | bash
 ```
 
 See [installation](/installation) for alternative options.
diff --git a/install.sh b/install.sh
index de473a4..2638498 100755
--- a/install.sh
+++ b/install.sh
@@ -31,7 +31,7 @@ else
 fi
 echo $ARCH
 
-curl -s https://api.github.com/repos/cupcakearmy/autorestic/releases/latest \
+wget -qO - https://api.github.com/repos/cupcakearmy/autorestic/releases/latest \
 | grep "browser_download_url.*_${OS}_${ARCH}" \
 | cut -d : -f 2,3 \
 | tr -d \" \
diff --git a/internal/backend.go b/internal/backend.go
index 8116d44..e60c709 100644
--- a/internal/backend.go
+++ b/internal/backend.go
@@ -58,20 +58,27 @@ func (b Backend) generateRepo() (string, error) {
 
 func (b Backend) getEnv() (map[string]string, error) {
 	env := make(map[string]string)
+	// Key
 	if b.Key != "" {
 		env["RESTIC_PASSWORD"] = b.Key
-	} else {
-		key, err := b.getKey()
-		if err != nil {
-			return nil, err
-		}
-		env["RESTIC_PASSWORD"] = key
 	}
+
+	// From config file
 	repo, err := b.generateRepo()
 	env["RESTIC_REPOSITORY"] = repo
 	for key, value := range b.Env {
 		env[strings.ToUpper(key)] = value
 	}
+
+	// From Envfile and passed as env
+	var prefix = "AUTORESTIC_" + strings.ToUpper(b.name) + "_"
+	for _, variable := range os.Environ() {
+		var splitted = strings.SplitN(variable, "=", 2)
+		if strings.HasPrefix(splitted[0], prefix) {
+			env[strings.TrimPrefix(splitted[0], prefix)] = splitted[1]
+		}
+	}
+
 	return env, err
 }
 
@@ -85,17 +92,6 @@ func generateRandomKey() string {
 	return key
 }
 
-func (b Backend) getKey() (string, error) {
-	if b.Key != "" {
-		return b.Key, nil
-	}
-	keyName := "AUTORESTIC_" + strings.ToUpper(b.name) + "_KEY"
-	if key, found := os.LookupEnv(keyName); found {
-		return key, nil
-	}
-	return "", fmt.Errorf("no key found for backend \"%s\"", b.name)
-}
-
 func (b Backend) validate() error {
 	if b.Type == "" {
 		return fmt.Errorf(`Backend "%s" has no "type"`, b.name)
@@ -105,8 +101,9 @@ func (b Backend) validate() error {
 	}
 	if b.Key == "" {
 		// Check if key is set in environment
-		if _, err := b.getKey(); err != nil {
-			// If not generate a new one
+		env, _ := b.getEnv()
+		if _, found := env["RESTIC_PASSWORD"]; !found {
+			// No key set in config file or env => generate random key and save file
 			key := generateRandomKey()
 			b.Key = key
 			c := GetConfig()
diff --git a/internal/bins/bins.go b/internal/bins/bins.go
index 87e9488..27c640c 100644
--- a/internal/bins/bins.go
+++ b/internal/bins/bins.go
@@ -47,11 +47,11 @@ func dlJSON(url string) (GithubRelease, error) {
 
 func Uninstall(restic bool) error {
 	if err := os.Remove(path.Join(INSTALL_PATH, "autorestic")); err != nil {
-		colors.Error.Println(err)
+		return err
 	}
 	if restic {
 		if err := os.Remove(path.Join(INSTALL_PATH, "restic")); err != nil {
-			colors.Error.Println(err)
+			return err
 		}
 	}
 	return nil
@@ -79,11 +79,15 @@ func downloadAndInstallAsset(body GithubRelease, name string) error {
 				return err
 			}
 			defer tmp.Close()
-			tmp.Chmod(0755)
-			io.Copy(tmp, bz)
+			if err := tmp.Chmod(0755); err != nil {
+				return err
+			}
+			if _, err := io.Copy(tmp, bz); err != nil {
+				return err
+			}
 
 			to := path.Join(INSTALL_PATH, name)
-			os.Remove(to) // Delete if current, ignore error if file does not exits.
+			defer os.Remove(to) // Delete if current, ignore error if file does not exits.
 			if err := os.Rename(tmp.Name(), to); err != nil {
 				return nil
 			}
@@ -121,9 +125,11 @@ func Upgrade(restic bool) error {
 	// Upgrade restic
 	if restic {
 		if err := InstallRestic(); err != nil {
-			colors.Error.Println(err)
+			return err
+		}
+		if err := upgradeRestic(); err != nil {
+			return err
 		}
-		upgradeRestic()
 	}
 
 	// Upgrade self
@@ -140,7 +146,9 @@ func Upgrade(restic bool) error {
 		return err
 	}
 	if current.LT(latest) {
-		downloadAndInstallAsset(body, "autorestic")
+		if err := downloadAndInstallAsset(body, "autorestic"); err != nil {
+			return err
+		}
 		colors.Success.Println("Updated autorestic")
 	} else {
 		colors.Body.Println("Already up to date")