Hi @FlyingTanap ,
Normally this is due to a permissions issue in Windows. I’m not sure if there’s anything I can suggest right now, other than perhaps to try installing into a different directory. Also maybe try right clicking the program and choosing “Run as administrator” to see if that helps.
I don’t think re-installing the previous version will help at all, but it’s here if you want to try: https://simbrief.com/app/fms-downloader/SimBrief%20Downloader%20Setup%201.6.3.exe
Best regards,