Do you have the latest patch? Many things have been fixed since version 0.75 (the first beta), and it is preferred that feedback and bug/crash issues be from the current version, which is 0.77 as of the time of this post. See here.
If you do have the latest patch, please submit your crashlogs, which are saved for virtually all crashes, and can be found in "C:\ProgramData\Stardock\Elemental - Fallen Enchantress". Note that ProgramData is a hidden folder, so you need to have the option to show hidden files and folders turned on in Windows.
Note this from the Fallen Enchantress - Beta FAQ Original Post:
Q: I found a bug or issue with the game, what do I do now?
A: If you have feedback please post in the FE Beta forum (http://forums.elementalgame.com/forum/1010). If you encounter any bugs or issues please post those in the support forum.
To make it easier for us, please tag your post title with [BUG], [CRASH], etc. Also, when reporting any issue, please let us know what version of the game you encountered the error on.
Thank you for your help in making Fallen Enchantress great.