I am using Joplin 1.0.227 on my laptop and 1.0.201 on my Desktop-PC. On 1.0.201 I can open .xopp and .pdf-files with xournal++, it is possible to edit and save. On 1.0.227 I am not able to open .xopp and .pdf-files. I am not able to open these files from the resources folder.
I’m using Ubuntu 18.04.