Mouse Buttons is a small, basic and simple utility, totally free and does not even require installation, which will allow you to set both the right and left buttons as the primary mouse button.
From Mouse Buttons you can exchange its functions, that is, the right button becomes the main one with all the usual functions that you can perform with the left one, while the left one becomes the secondary button and, therefore, to perform your own actions of the.
It is also interesting that Mouse Buttons can be executed from the Windows command line.
You can free download Mouse Buttons 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.