Program is crashing a lot

First let me say I love this program. Second I am new to MTG and this Forge program. This program allows me a great way to learn the rules of the game and try strategies out without embarrasment.
Now to the issue. The game seems to be crashing a lot. By crashing I mean a window pops up and gives me an option to save, close, exit application or continue. It used to happen every few games or so but now it seems like I cant finish a 3 game match vs the AI without the error popping up. Once the error occurs if i click continue nothing i can't continue with the game. None of the game buttons work. I eventually try to close the program and get credited with a loss for the match. I've upgraded to the latest version of Java and have Windows 7. Is there anything I can do to reduce the amount of errors occuring? I've attached just one of the most recent error logs that occured.
Now to the issue. The game seems to be crashing a lot. By crashing I mean a window pops up and gives me an option to save, close, exit application or continue. It used to happen every few games or so but now it seems like I cant finish a 3 game match vs the AI without the error popping up. Once the error occurs if i click continue nothing i can't continue with the game. None of the game buttons work. I eventually try to close the program and get credited with a loss for the match. I've upgraded to the latest version of Java and have Windows 7. Is there anything I can do to reduce the amount of errors occuring? I've attached just one of the most recent error logs that occured.