First of all, sorry for any inconvenience...
The first updated version (4.0.0) had a crash issue, and it has fixed in more recent updates (4.0.3).
Can you check whether the error still persists after updating Capriccio to the latest version?
About the new interface, there has been a lot of talk about stagnation of the Capriccio's design in many recent years, so I have prepared for a complete design renewal.
I will continue to improve this design so that it does not cause inconvenience.