opening from and saving to local folders

[titus]

@rich2005

I am on Win7 x64 (should have mentioned it in my opening post).
Gimp portable 2.10 x64-bit from partha works as it should. All local folders are listed and can be opened.
Problem solved!
My initial problem was caused by the build made by Portable Apps.

Thanks again!

@dinasset

Thanks for your hint.
Since the portable from partha works fine, I didn't test samj's portable farther on.