I’m just starting to use Shotcut 18.07.02 on Windows 7 about two weeks ago. It seems to be becoming increasingly unstable over time. At first it would only crashed once in a while. Then more frequently. Now it crashes every time I open my project. I can’t do any work at all on it.
Re install 18.07.02 and choose the option to remove registry settings.
(Assuming you are using the Windows version as you haven’t said)
If all else fails, go back to an earlier version such as 18.03 [Links on the shotcut download page]
Your description does not provide more information about your subject. Overall, this post is very vague and useless.