Hi droga,
I had the same problem, the builder asks for a license every time it is invoked. You can just close the window (red x). Depending on the complexity of the code, this has to be done several times.
I read about a solution on towergeeks, but I could not find the mentioned registry key. Somewhere else I found that it would be fixed with some hotfix, can't remember where.
Hope it helps,
Dominik