Conserve text field output/display in App Designer across runs

Dear All,

I have a text field in an app; its output (text/char string) is modified either by typing into it (the usual way), or searching for a directory path using a load button. How can I make the text persist from one session to another (closing and opening the app)?

I tried to create a global variable and assigned this text to it, but closing the app does not preserve its contents.

Many thanks,

Octavian