Go to the Settings folder in the user path (same as where the mods go, just \Setting instead of \Mods.
Open user.setting and at the bottom change showErrors to TRUE.
When the game minidumps, if it's because of something wrong with an .entity file it will show you which file and which line, along with a short description of what it was expecting.
If it still does a generic minidump, it's some deeper issue and you'd probably have to email the dump file email@example.com to see if they can tell you what exactly causes it. Sometimes AI causes minidumps with modded files >.>