I have the Steam versions of platinum 14, 16 and 17. When I try to open 16 or 17, I get a problem report. I send the report and MAGIX tells me they can't repair a Steam version. I try to use Steam support and they tell me they can't repair a third party software and link me here. I am frustrated to say the least. I have used ver 16 and 17 previous to a windows 11 update. I do not have the problem with Win 10 on another computer. However, the other computer is not set up for video production. Thank you in advance for your help.