This is a short troubleshooting guide I created to help improve the performance of BG and maybe fix some crashes.
Some info is taken from the readme file.
Work your way down the list trying things. It's generally cumulative so keep the earlier suggestions at first, unless they aren't feasible. Manually delete the BG cache files after playing a game. Keep plenty of spare disk space so vitual memory is unhindered - aside from the cache directory as well. Turn off weather effects.