Some functions does not work!

Hey! I have been using shotcut for a couple of days now but when I wanted to make a quick video today I realised that some functions like filters, adding a new line for videos on timelines and stuff like muting on the timeline dident work. I can add videos into the program just like normal but I cant really do anything else. I have tried to reinstalling it aswell as repairing it. Any tips on how I can fix this?