Do the scripts even handle a R14->3513 install?
Nope.
At first glance that would be beyond the scope and intent of project goals. Then upon
reflection I thought, why?
No good reason. In an ideal world I suppose we should support both directions. I'm
sure there will be users who will test R14, say WTF for various unexpected problems and
want to revert to 3.5.x.
A temporary fix would be for users to copy both scripts (migratekde3, r14-xdg-update) with
new names (restorekde3, r14-xdg-restore?) and then reverse all of the replacement
snippets.
Somebody who is a script wizard could revise the existing scripts such that users could
use the scripts in either direction.
Darrell