Hoster will not open

[gzinser]

Mirc is a karaoke song download site (see www.karaokeinfo.com). I've been using it for many years, but recently transferred it from an old computer to the same one I have (had) Hoster on. Two other programs were also installed at that time-- Power CDG (see www.************.com) and MP3+g Toolz. When Hoster wouldn't open yesterday (one hour before a party of 50 was due to arrive at the house), I did a system restore with a restore date prior to the time I installed the two new programs. That had no effect. Then in desperation, I purchased the upgrade to Hoster on the mtu website (even though I already had the latest version). This didn't work either. I then uninstalled and reinstalled the program several times using the registration code I received when I purchased the upgrade. This had no effect. Now I'm not sure what to do to get it back, and am also interested in finding out what caused the problem so I can avoid a repeat. BTW, I'm running Windows 7 and a few months ago I made all of the system changes as directed by MTU. Thanks very much for any help you can provide.

Greg