I ahd the same problem with it impacting my system. Plus it said it was a free download but after the eval it shut it's self off and was annoying that everytime I logged in it popped up saying "your evaluation of SQL Prompt has expired" ended up uninstalling. I like the feature as I like the fact I don't need to type (I'm a lazy dba).

I would try it again and gladly pay for the program if the bugs were fixed.