- added "Pooling=False" parameter to all Sqlite connection strings to prevent open file locks after closing the connection and to avoid extreme delays when using CloseAllPools()
- C# code refactoring "using var" instead of "using ( ) { }" where possible
- replaced misuse of "FileLoadException" with a custom LoaderException to handle file loading issues with better continue/fail logic
- removed "Save As" and replaced it with "Convert list" menu item that shows information on how to use a reference list instead of direct conversion
- Reference list dialog further optimized to fit 1920x1080 @150% or 1024x768 @100% screens
- re-imported translation file (to fix incorrect letters in language names like "Русский")
- upgrade to DevExpress 22.1 libraries
