test keyfile.key exist

dists/uninstall-kaspersky/set-password-encrypted.ps1

@@ -2,11 +2,13 @@
 $KeyFile = Read-Host -Prompt "Key File (please put .key extension)"
 $Password = Read-Host -AsSecureString -Prompt "Password to secure"
 
-$Key = New-Object Byte[] 32 # create key AES 256-bit key (32 bytes)
-[Security.Cryptography.RNGCryptoServiceProvider]::Create().GetBytes($Key)
-$Key | Out-File $KeyFile
+if ($KeyFile) {
+	$Key = New-Object Byte[] 32 # create key AES 256-bit key (32 bytes)
+	[Security.Cryptography.RNGCryptoServiceProvider]::Create().GetBytes($Key)
+	$Key | Out-File $KeyFile
 
-$EncryptedPass = ConvertFrom-SecureString -SecureString $Password -Key $Key
+	$EncryptedPass = ConvertFrom-SecureString -SecureString $Password -Key $Key
+}
 
 Write-Output ""
 Write-Output "# Lines to add in your configuration file Custom-VarOverload.psm1"