Updated to version 2.8.0, which is for Blender 2.80 and onwards.
The version for 2.79 is here:
Download (for Blender 2.80):
Go to the GitHub page: https://github.com/R...aterial-Manager
Right click the .py file, then go to Save As and put it in some folder.
(Or go to Clone or Download and save it as a zip file to your computer).
Be aware that this file isn't synchronised with the one on my PC, and the latter is the one that gets uploaded to Github, not the other way round.
Edited by R Soul, 13 March 2019 - 06:11 PM.