You’re correct. Currently this is a limitation on Mudita Kompakt. PC users can use the Windows Explorer function to get to their Photos.
I realize that this is not the solution for you, however, there are users on here who use MacDroid app for transfer. It’s a freemium app, but you can also use a free app called OpenMTP. This seems to do the trick for MacOS users until we get this feature in Mudita Center.
As a PC user, I can’t download from Mudita Center either. It’s a missing feature- I agree. But since I use a PC, Windows explorer works for now.