I didn't see this in the CrossOver documenation or another post so I though I would put it in just in case.
I've been trying to install World of Tanks for 3 days using different bottle types and methods of install.
The creation was always successful, but when the game loaded and began to do its download and update, it would crash quickly.
The message "An unhandled exception is occured. The application will be restarted." would appear.
I was trying an install using play on linux when a message popped up.
The cut down version of the message is once the the installer starts, click on the wrench in top right corner. Uncheck the "Allow torrents" box. Press Ok and let the downloader restart. Otherwise it will crash within a minute.
Which is what was happening to me.
Since I made the change my downloarder is working.
Hope this helps.