I am clueless how to open blend files from the file manager. It doesnt show up in default applications. Can you tell me how to set blender as default program for .blend files? Thanks! Andreas
You didn't mention how you installed Blender, but I guess you downloaded the official build from the website as a tar.bz2 and extracted that somewhere. If you download from AppCenter it should work out of the box, but you will probably not get the most current version.
If you installed it manually, in order for Blender to show up in the desktop environment you need to provide a .desktop file. That will put it in the application launcher in the top bar and it will also let you open .blend files from the file manager.
The official Blender download comes with a desktop file, but you will have to edit the line that says
to something like
... where of course you should substitute
/path/to/blender with the real path.
Then copy or link the file to