Workflow for testing new versions

Install new version, and ensure no errors/previous setting preserved
Disable/Re-enable add-on for preferences reset
Ensure File > New/Splash Screen empty
Ensure operators are disabled (if they need templates)
Add single template from prefs (select path, name should auto complete from filename)
Ensure operators are enabled (if they need templates)
Add from folder (the same of the previous template, but with others) The folder templates (with optional nested levels) should be added, excluding aready present ones.
Ensure File > New/Splash Screen match
Ensure File > New/Splash Screen works opening
Test the Splash Screen Switch (optionally checking preference persistence across restart)
Export the list to JSON file
Clear all templates (from settings)
Import the exported file
Ensure template list match previous
Test reordering/removing
Enable Extra option File > New > Start From...
Ensure it works (optionally checking add templates)
Ensure it doesn't show up with ctrl + N (which would not work properly because of context)
Test File > Defaults > Select new template
Test File > Defaults > Use current as template
Test File > Defaults > Manage templates/same as Splash Screen
Test Workspace menu > Add from Custom Templates feature
Ensure File > New/Splash Screen match
Nice, version ready!