That doesn't sound good. However, I have version 0.9.3 running since release and never have had a crash. My default setup is having 6 Kinovea open at the same time without any problem.
To narrow the problem some infos would be interesting:
Are any other programs also crashing
Do the camera-drivers, if are installed, have the right version that is compatible with Kinovea 0.9.3. There are a lot of error messages related to the IDS-camera. IDS-software suite Version 4.93 will work. If you have the Basler pylon software installed, be sure to have 6.0 (not 6.1 !)
Try to deactivate all virus programs. To be save, you could disconnect the internet during testing.
However, what I have personally seen is, that once this type of error occurs, it definitively is time to reinstall Windows from scratch. Expecially if the windows version is updated from an older version (i.e. Windows 8), I have found similar problems. Another reason I have seen are some "tools" - installation (these nice small programs we all like ) that replace important Windows-DLLs.
Since longer time, I always reinstall the system on a clean partition if windows shows a strange behavior.
Futhermore, if the computer is running for some years, remove and reassemble the memory-chips after running a memory-checking program to secure that the chips are in good conditions. Also disconnect and reconnect the graphics card to the motherboard slot.