Hi!
I tried to install wiris in moodle 2.4+. The installation automaticly tried to upgrade book activity, but unfortunetly older version. Now i get message that I couldn't downgrade it.
My question is: how to clear this upgrade because i can't install other applications?
as help it gives me an answer:
It might be that you've accidentally tried to install a version compatible with older versions of Moodle. In this case, check the Moodle plugins database for the correct version with your Moodle and install this.
I hope that somebody could help me. I just started to use moodle.