I received the message "A fatal problem has been brought to the attention of Visual Assist X. If you are able to, please capture a minidump before dismissing this message and send to Whole Tomato support. We recommend restarting Visual Studio after pressing OK (if it doesn't crash)."
If you will get this message again and will be able to upload or to send the file from an another location (e.g. home) then here is some info about minidumps and how to send them in (at the bottom)