prototpye for powershell script to be executed after installation

dist/win/contrib/170FuseMigration.ps1

@@ -0,0 +1,12 @@
+$settingsPath = 'C:\Users\Arbeit\AppData\Roaming\Cryptomator-Dev\settings1617.json'
+$settings = Get-Content -Path $settingsPath | ConvertFrom-Json
+$atLeastOneCustomPath = $false;
+foreach ($vault in $settings.directories){
+    $atLeastOneCustomPath = $atLeastOneCustomPath -or ($vault.useCustomMountPath -eq "True")
+}
+
+if( $atLeastOneCustomPath -and ($settings.preferredVolumeImpl -eq "FUSE")) {
+    Add-Member -Force -InputObject $settings -Name "mountService" -Value "org.cryptomator.frontend.fuse.mount.WinFspMountProvider" -MemberType NoteProperty
+    $newSettings  = $settings | Select-Object * -ExcludeProperty "preferredVolumeImpl"
+    ConvertTo-Json $newSettings | Set-Content -Path $settingsPath
+}