You can definitely revert this upgrade. For mx7 you would use the method Kathryn posted, but in mx8 the subversion was upgraded to 1.9. You can figure out the same method using Smartsvn or make sure to install tortoise svn 1.9 and attempt the same method in Kathryn’s post.
Here is some info on the subversion:
You may be able to roll back using SVN, see this thread. https://forum.mendix.com/link/questions/7328
Yeah. I committed changes in 8.3. Thanks for valuable suggestion.