Problems with cleanup assistant 1.3

Hi everybody. I need help to solve a problem with cleanup assistant 1.3. I've been using this software for a long time, and recently, I don´t know why, it stoped functionning. Every time I launch it, I get a message saying that windows found some problem and closed the application. I already tried to uninstall and re-install, but I get the message again and I can't use cleanup assistant 1.3. My os is windows vista.

I appreciate any help or advice. 

Thanks.

Paulo