When I had this issue with the 'stable' version (which, unlike your case, was resolved by installing a nightly build), I found a diagnostic report which seemed to relate to the crash in [USER]\%APPDATA%\Local\Elevated Diagnostics (you will need to turn on viewing of hidden and system files to see this folder). If there is a report there, Joel might like to know what it contains. To me, it would indicate some sort of issue with the dotNET framework runtime (= the Microsoft libraries). It might be worth downloading and reinstalling these, but it would be helpful if Joel could suggest which version you need (there are several).
A slightly less drastic option is to do a full uninstall of Eraser, if you can deleting the install folders and doing a registry clean, before reinstalling the nightly build. You may have already done this, of course.
Unfortunately, you seem to have a system- or installation-specific problem. As I said, Eraser 6.2 is now running normally on my Windows 7 x64 machine.
David