Remove Add-ins from start-up

Hi. So I want my SW to load up faster by removing add-ins I don't use (e.g. plastics, simulation and so on). How do I achieve this?

I tried searching for similar Q & F's but I couldn't really understand, e.g. the following:

https://r1132100503382-eu1-3dswym.3dexperience.3ds.com/community/swym:prd:R1132100503382:community:yUw32GbYTEqKdgY7-jbZPg?content=swym:prd:R1132100503382:qnaquestion:IrxgjQNzR3OGLIQJ6BLG2Q

 

Thxs for the help.