It is wasting a lot of time Checking after crashes. I have some large downloads going.  

How can I help with information to stop Tixati from crashing.  Logs?  Dumps?  What?

What OS?

are you doing anything when it crashes?

are you getting a crash report? if so, send it in or upload it to a file sharing site and put a link here.

I'd first check your RAM if it's error-free. Use memtest86+ I had a nasty crashing with one program some time ago and it turned out to be faulty memory.