Speedikon BUG! Roof and Floor disappear completely!

As soon you think it is ready done:

You click on a Roof part and Speedikon does not recognize it.

 

A message  like "unknown class" appears.

Slabs, walls, windows and doors, stairs are all still there and work properly!

All filters are off, all levels are on, "Regenerate" function does not help!

 

After restaring the programm you have no "Floor" and no "Roof" anymore!