How can I access my iStripper files (for example files for models in my collection} in Windows 11?

First enable
Show Hidden files and Folders
https://support.microsoft.com/en-us/windows/view-hidden-files-and-folders-in-windows-97fbc472-c603-9d90-91d0-1166d1d9f4b5

Then Navigate to

C:\Users\USERNAME\AppData\Local\vghd\Models

and

C:\Users\USERNAME\AppData\Local\vghd\Data

You can also Get there via The FullScreen Page.

On the iStripper app.
In the Upper right hand corner, Open the Drop Down Menu
then click on FullScreen
At the top of the Scenes page is a Folder Icon
Click on that to Open the Scenes Folder

C:\Users\USERNAME\AppData\Local\vghd\Data\Scenes

from that Folder you can go up to the Parent Data Folder

C:\Users\USERNAME\AppData\Local\vghd\Data

and from that one you can go up to the Parent VGHD folder

C:\Users\USERNAME\AppData\Local\vghd

Then from there you can open the Models Folder

C:\Users\USERNAME\AppData\Local\vghd\Models