Thank for becoming our client!
There's no way to disable the "expand" button at this time, but as promised, we will deliver it very quicly.
We just had Easter holidays, so please allow 2 days or so for this feature to be implemented and tested. Then we will release a new version to which you will be able to upgrade for free (as a customer you have free updates for 6 months).
I will reply to this thread when the new version is online.
Thank you again for your patience.
-- Mihai