Its the HKEY_CURRENT_USER FOLDER.
Its not that hard man, just gotta look a little... Try this...
Start
Run
type "regedit"
click on my computer (might not be needed but i did it anyway)
Go to top and hit "edit" then "find"
type in "trail period" (without the quotation and leave the space in between so it looks like this trial period
make sure all the other boxes are checked.
hit find next and it should say trial period in the other frame and under data it will tell you the exact location of file. I think the confusion was, for me anyway it was ina folder called vba program settings or something.
So in the trail period folder, it has your user login, click on it, and under the next frame click on Daily Limit - Message count.. it might say 50 if you just used all your messages for the day.... right click on it, hit modify, change the number to zero, and hit ok. now restart fpb and it should be all good.