Calc Pro 2.0.6 has been released. This version fixes the menu bug seen on some newer HTC devices. If 2.0.5 works correctly there is no need to update (but it won't cause problems either).
Also worth noting - Panoramic Calc Pro for Windows Mobile Standard will be ready for release in less than 1 week. The interface has been completely reworked to get the most of out of WM Smartphone controls - but all of the same power and features will be available the for non-touch screen phones.
More information on Calc Pro is available here: