Roof/Floors drop down menu deactivated

Duncan,
 
We are trying to fix the weather files situation thank you so much for your help and patience during this process.
 
Meanwhile I have encountered another problem, the Roof/Floors menu tab appears inactive and the floor outline appears in black not allowing me to work on the roofs and if there is a way to delete added roofs that I do not use anymore.
 
Can you please help me with this?
 
Thank you,
Mina.