File links completely broken after update to v5.2

[EliasBRL]

JabRef version 5.2 on Windows 10

• Mandatory: I have tested the latest development version from http://builds.jabref.org/master/ and the problem persists

I like to keep a local PDF copy of all papers I read. The PDFs are in the same directory as my JabRef.bib. In JabRef version 5.1, I linked each PDF to its JabRef entry via General -> File -> +.

After updating to version 5.2, all links are broken. When I click on any "PDF button" in the overview, JabRef opens my Documents directory (which is not the directory where I store the PDFs) instead of the PDF.

I am also unable to fix the broken links or add new links. This appears to work (I can browse my files, select the desired file, and it is displayed under General -> File), but when I click on the "PDF button", it just opens the Documents directory as before...

Steps to reproduce the behavior:

1. Create new entry
2. Add PDF file
3. Click on "PDF button" in the overview

[Siedlerchr]

Duplicate of #7259