I am using the free version. When I deleted a section to renew and explore a different option, it did not allow me to undo it as would usually available it was greyed out/unsuable. Now, I feel forced to upgrade to restore the previous version. I'm exploring this for my school to get a but being annoyed and losing my work means I may as well move to another provider because now I don't have the evidence of what MM can offer. I should be allowed to have three mindmaps and restore within those three. I can understand not being allowed to make copies but restoring should be possible.