I upgraded my Samsung A6 to android 6.0.1 and I get some errors with MPE :
I use an external SD card for my pictures and documents.
the path for pictures : not found by MPE
the path for documents : not found by MPE
the path for the external sd-card has been moved to a subfolder in system memory tree (the external memory card was not visible directly in the tree of MPE).
I changed my script to the new folder, sync was partly possible (changes to files were not possible (write on sd-card not asked)).
ALL is RESOLVED :
Altough the MPE client was not to be upgraded, I upgraded it with Play Store.
I then was able the sync my docs (with the modified path as part of system memory folder). "Choose root folder" well asked.
But impossible to sync my pictures : path not found.
I unmounted and remounted the sd card : no changes.
I then changed the langage of MPE from French to English (I wanted to get the correct error messages) --> no more errors
I turn language back to French : eveything is now OK.
MPE is a wonderful software.