[ddouglass]

It is possible if you still have the setup file for the earlier version. MTU does not keep those where we can download them. That is why they say to save them in a safe place.

If Hoster has been running ok until last night then think about what if anything you have done since the last time you used it before. Could be something you changed or added that may have triggered the slowdown.
Have you tried running Chckdisk to see if the drive may have any bad sectors popping up? Those can give you fits and have you chasing your own tail.
I would recommend you go ahead and do the SP3 update. I don't think it has anything to do with this problem but it can't hurt.
Try un-installing and re-installing Hoster and see if that clears it up. Rebuilding the database wouldn't hurt either as the database file may have a problem in it that is slowing down its response to the program.