Need some pointers

Hi, this is my first post here and I was hoping some of you could give me some pointers on how I could approach cracking this program:http://www.mechtrading.com/qcollector/esignal/index.htm. It's a program that is fully functional, but with some limitations to the amount of symbols (it's a stock downloader) you can download.

So far, I was able to unpack it (it uses Asp 1.23), disassemble, and map out how I think it works. The protection is based on a key that you enter through the About menu in a window that asks you to enter the key that they emailed you. From here, if it finds a good key, it stores the key in the registry. When you start the program it rechecks the license key either on file or in the registry or both and if it doesn't find it it resets everything. So obviously, if you just patch the key entry part, it resets the next time the program starts.

The other thing I tried was patching the start-up window, which tells you you have a trial copy limited to xyz symbols. The patch worked and gave me a screen which said it was now registered to "____", a name should have been here . It still didn't work, but the point is that I think it needs a name as well as a number.... there are no distinct fileds in the key paste window, you just paste whatever they gave you.

So, now I'm a bit lost. I've seen tuts on keys, but not when combined with reg entry. When I set bps on regvalue calls, it's tough to figure out if it's the one I need, or just a basic reg call. My idea was to make it so whatever value the registry call saw it would be good. Not sure if registry bp are the way to go, though. Any pointers on how some of you more experienced guys would do this would be really helpful.

Thanks and great board.