Hello!
I found a workaround for this and i’m not working on that project anymore so this isn’t bugging me, but it’s worth mentioning i guess.
I hadn’t had any problems until a couple of hours after the DLL and the new build was released, the latest project i was working on started not working.
It stayed there minimized(it doesn’t even have a thumbnail image) when i launched Rocket and i wasn’t able to get it working no matter what. Then i downloaded the .dll file but it didn’t help either. And finally i downloaded and installed build 1761932, but again the same thing happened. Then i opened the new Card demo and it worked just fine, so i created a new project from there and i have no problem anymore.
System Specs:
GTX 460 - Driver version 326.19
i5 3570
8GB Ram
120GB SSD
Windows 7 - 64bit
UAC - Off
Install Path: C:/Program Files/Rocket
I’m also attaching the latest log for that project.
[link text][2]
Hope this helps!
I had a similar issue to this a little while back, but it was related to attempting to start a new project, and then cancelling out of the dialog before it was created.
The problem then was that Rocket was bookmarking a non-existent project, causing the program to hang. In your case, it’s quite possible that Rocket is doing the very same thing.
So here’s a handy little thing I learned. Try double clicking on a different *.uproject file in windows explorer, and force Rocket to open up that file, instead of a direct run. This will open (and bookmark!) THAT project in rocket, and (hopefully) you can continue about your business as if nothing happened.
It’s gotten me out of a bind once or twice when beta testing and experimenting in Rocket :). It helps also to make sure to keep periodic backups of your maps and assets in case Rocket botches things up somehow.
Good luck.
Thanks, Markus. And yeah, that is what i found out as well after opening the Card project out of frustration. Better make double sure in the future when i start to build a whole project. 
Next time this happens, you can try pressing WIN + UP Arrow to maximize the window. At least this was what helped me when this problem happened to me.