Thanks a lot Kenneth.
I now indeed come to the "pick an app" dialog. I now only have the problem that the dialog does not provide any app to open the chosen file.
With TeamDrive version 3 (parallel installation) I do not have this issue. Also there this dialog opens when I tap the file and I then can chose from different apps to open the file.
Based here on I assume that version 3 and 4 have a different handle to open a file.
Can you check this? Can I do anything to change this behaviour also in version 4?
Thanks in advance.
Gruß,
Martin