I am running the same version (7032 on Win 7 64bit) and I do not run into this issue. Here is what I would try if you haven't already done so (in the order listed).
1. Reboot your computer (then re-check).
2. Reset tools layout to see if that helps (options > reset tools layout then re-check)
3. Try updating to the latest version of Java (then re-check).
4. If none of the above work, load the calendar then close TB 7032, capture a copy of your log file to send on over to support. I would create a support request by visiting support.thebrain.com.