I cant do anything!!

Hi
Im a beginnger, I was using Harmony 10 and created a file
Then Installed Harmony 12 and I opened it. and I cant do anything and my cursor is red, If I hold B I can brush but it will disappear.
I cant even do anything on a new file
here is a pic:
https://www.dropbox.com/s/958cbtmi0k2lfgr/20160704_203142.jpg?dl=0

Thanks for your help :slight_smile: