Crashes on 10.9.5, but works fine on El Capitan

I’ve been a loyal user of this previously fantastic software for many years. Now, it crashes every time I try to open it.

Exception Type: EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000

UPDATE:
I’ve upgraded to El Capitan and it works great once again.

This is a great app, simple to use, and allows me to manage passwords across the board.
The UI is not elegant, but is clear and intuitive.

Robv23 about pwSafe - Password Safe