Change default title in app

[[Lu...]]

Hi everyone!
I have an App that is migrated from a GOM-Skin. Someone has mistakenly overwritten the default title for some report pages with project-specific info.
I'm struggling to change the default title back to "Untitled" and export that to the *.addon format.

What I have tried:
Under Apps->App-Editor->Edit App->select page in "report templates"->in Properties - Report Template change the default title back to "untitled" ->Finish App

Exporting and Re-importing the .addon does not change it

Can someone nudge me in the right direction?
What am I missing?

[[Ma...]]

First you have to enter editing mode for report template ( right click on "Style" and select "Edit template" )

Now you can modify - after changes export this template into new or existing app