How to set MB3 as the default player instead of MB2.5

[HHM]

Since betas of MB3 have appeared I use only this version of MusicBee. However, all files are associated with MusicBee 2.5. Unfortunatelly MB3 does not even appear in the "set default programs" panel in Windows 10 - there is only option to set MB2.5 as default. At least I can't find.

Any doubleclickof music file in windows explorer or context menu option sends files to MB2.5 : - (

How can I change it?

[Steven]

same way as v2.5
run as an administrator if you are not already one
in the first preferences tab, make sure  the Windows Explorer/context menu option is ticked - it probably already is but you need to run as an admin at least once for it to take effect