Is it possible to upgrade a Task Add-In while leaving all the configured Tasks in place?

Currently, I have to remove the old Task Add-In first resulting in a cascade delete of all related configured Tasks, which in-turn removes all related Actions from the Transitions, etc.

A real pain to reconfigure.  I seen some information on importing a .cex to upgrade a Task Add-In, but not sure how I would generate the .cex   Install & export on a test vault?

Greg,

EPDM2014 SP4