Please check these guides first in case they are relevant to the type of crash:
[ul][li]Crash, exit or high CPU usage when viewing certain directories[/li]
[li]Crash, exit or high CPU usage when right-clicking certain files[/li][/ul]
If the guides do not help, please email the crash dumps and descriptions of what was happening when the crashes occurred to leo@gpsoft.com.au and I will see if the dumps reveal any clues.