Cannot render multiple projects at once

Not sure if this qualifies as a bug report or a feature request. But I have several Vegas projects taking about 2 hours each to render, and I'd like to go to bed while they render. But I can only start one, which means that for about 6 hours my computer will be doing nothing while I sleep. When I try to start a second render, it says it can't start a Voukoder Pro session, the log says it's because my license is already in use by the other instance. I understand the need for anti-piracy but perhaps the program can check if the other active instance of the license is on the same computer?