Unable to restart Finalcut7

Hello to you

I work on mac with Finalcut 7 comfortably for a year, but since yesterday, I can no longer open the application. The boot process starts and then quit working.

I see no reason for this bug. I check the status of my hard work, it is ok. I removed the software via "digital rebellion" and then reinstalled final cut: the problem is still there.

Is anyone else have this problem or have an idea about the possible reasons for this bug?

Urgent payday. Thank you for coming to my aid