Rush freezes, lags and does not save

I have recently downloaded Rush on windows 10. The computer meets all the requirements listed and is up to date. Rush is constantly freezing, extremely laggy, and does not save changes. 

I have seen these issues brought up in the community, but cannot find any answers. It makes it almost impossible to actually edit anything. I have the playback quality on low and have set it to pre-render sequences. 

In the video I'm currently editing, there is about 3 minutes of footage. When I add a larger video file (let's say 6 minutes long) for the purpose of editing it down into usable clips, it bogs down Rush dramatically. If this were the only issue, and it only lasted a few minutes, I could handle it. 

Audio will un-sync from video and become laggy. (And when the video is saved, it is still laggy in the final version.) Clips will not move when I attempt to drag them. Menus will not open. Slider bars will not slide. This gets worse and worse until I leave it alone for 10+ minutes to unfreeze, then I close the project and restart my computer. Upon reopening, video clips, title slides, and some fine tuning details such as speed or volume control have been deleted- even if they were not the last thing that I was working on. 

Any help is appreciated