Find 2019 Lacerte Web Setup and make a shortcut to it on your desktop, or PIN to Taskbar. Instead of doing the update from the program (often buggy in how it works), click the 2019 Lacerte Web Setup and let it run. That generally, in my experience gives a cleaner update.

Run 2019 Lacerte Web Setup again, before wasting time with support. 

If you call support and get a logical solution, please post it here.