Create the app with your prj folder, but keep a copy of the folder somewhere else
Reload your app.
Save and close the app.
Replace your application prj with the original prj folder
Reopen your app.
I believe this is the only thinkable method to manage keeping your field triggers. Triggers disappear when the app loses the triggered field. replacing the prj to a loaded application should hopefully reinitiate the triggers.
Plees ekskuse my Swenglish and or Norweglish spelling misstakes
That makes sense. However, it's not feasible when you're working with source control. I may have to pull a project out of source control that hasn't even been looked at for years. It may not have a loaded version lying around. And having to store a binary document in source control to circumvent the issue more or less makes source control pointless.