ecomes noresponsive sometimes

The application meets my needs overall. Howwever it becomes noresponsive sometimes. I use it daily and have crushes 2- 3 times per week. There is no clear pattern why it hangs. I have to use force quit. I run it for more than 1.5 year with upgrades and have such problem from the start. I have upgraded my OS to OS X 10.9. but the problem is still there. It happens much more often than with any other application on my Macbook pro.

I Chess about pwSafe - Password Safe, v3.0