Upgrading

Do I need to worry if I haven’t moved into the tower yet?
How do I upgrade from Uvirith’s Legacy 3.0 (or 3.1) to 3.2?
Will I lose all my stuff when I clean my save?
What is the UL_Upgrader_MWSE.esp?
I've already done the inscription quest in Uvirith’s Legacy 3.0. Will I lose my quills?
After upgrading, do I have to reactivate all the teleportation platforms?
Is Uvirith’s Legacy 3.0 compatible with 2.0 saves?