Line tool lagging, how do I go back to the most privative version of animate?

Hey. So ive been using adobe animate for about 5 years now, and have upgraded laptops 2 times since then but it always seems like no mater how much more processor speed or ram I upgrade too Animate ALWAYS has lagging issues. 

Now whenever I try to use the line tool or shapes tool it lags like i'm trying to process nasa level equasions. I was looking how to go back to more primitive versions of flash (since all the tools I use have been around since it was adobe flash) and coulnd't find it on the pro design tools website? Since creative clowd will only let me download 23 and up is there any way to go back to the most privitive version of adobe animate?

Please help as I'm seriously worried I'm gonna have to start shilling out another 6 grand or so a year on a new comp just to keep up with the ever increasing demands of the newest adobe software when I only use it in the most basic tools like pencil, shapes, and of course the layer linking. 

Honestly the effects in my videos could be created by oldschool adobe flash