How do I open a file with double click?

[aero4]

Hi all!

I managed to install Affinity V3 using the graphical installer and installed the newest version.
I have other wine apps running and I am able to open a specific file with a wine app directly ("open with").
But when I open a .afdesign file with Affinity Suite, just the start page pops up and the file is not opened.
I tried different methods like different Wine versions, win path, linux path and so on, nothing worked.

Did anyone of you manage to open an affinity file directly with affinity or knows how to do this?