Fix config editor handling keep-open incorrectly

src/Release.ps1

@@ -6,6 +6,13 @@ $7z          = 'C:\Program Files\7-Zip\7z.exe'
 
 $targetDir = $tmpDir + "\mpv.net-$($versionInfo.FileVersion)-beta"
 Copy-Item $PSScriptRoot\bin $targetDir -Recurse -Exclude 'System.Management.Automation.xml'
+
+$folders = 'Debug', 'Release', 'x64', 'x86', 'Arm'
+
+foreach ($folder in $folders) {
+    Remove-Item (Join-Path $targetDir $folder) -Recurse -ErrorAction SilentlyContinue
+}
+
 & $7z a -tzip -mx9 "$targetDir.zip" -r "$targetDir\*"
 if ($LastExitCode) { throw $LastExitCode }