I upgraded from 10.0 to 10.1 for a few days. Due to conflicts with other packages, i had to downgrade back to 10.0. Now I cannot open any .mxd file I opened with 10.1.
I did not create any with 10.1, they were all 10.0 mxds that Acr "upgraded" for me, so it's not an issue of unsupported features.
How can I "downgrade" the mxds? 10.0's MXD Doctor can't find any layeres in the MXDs opened and saved with 10.1.