Ok, little update guys, I downgraded(or upgraded depending which perspective you came from) to the 2017 version:
which I downloaded from the official site here: Downloading older versions | SketchUp Help and AMS Library and MSPhysics (Both by Anton) works along with the complete SP Gears plugin (which is by LE_GALL)!
Shame the gear making plugin doesn’t automatically scale with the number of teeth you put in so that they would mesh correctly with an equivalent gear of the same pitch and diameter so you would have to manually calculate the equivalent and then input that into the fields to make it. Who even is maintaining the SP Gear addon? Oh right that guy but he seems to have been dead after that one post confused as to where to post his updated version… I guess I’ll go ping him and see if he replies back…
Anyways, thanks for answering!