Running two versions of Sketchup on Two different Computers

I am currently running Sketchup Pro 2017 on OSX Yosemite 10.10.5.
It is a perpetual license that I pay $120 per year to maintain. I have this installed on one computer at my house and one at my cabinet shop.

I would like to consider upgrading the license so that I could run it on another iMac that I own which uses OSXC Mojave 10.14.6.

I am sure there are a lot of great features in the newest version of SketchUp but overall I am quite content with everything I can get done on the older version. My only reason for upgrading is that I would like to take advantage of some ScreenFlow software to create videos of my sketchup designs. I would use the videos to explain to my kitchen customers pros & cons of different design options.

I am a bit reluctant about upgrading because of “Known Issues” such as the one described today at the top of this forum. I am leery of being without my old version of sketchup so would like to see if it is feasible to run two different versions on two different computers. I am more than willing to pay for two licenses, or at least I think I am. I spent a fair amount of time on the Sketchup Pricing Pages last night but no matter what FAQ page I landed on I could never really tell what my options were or what they cost.

Is there a single source of information that explains what my options for licenses are and how much they might cost? Rule number one in my business is you never want to confuse the customer when you’re talking about money. So far as I can see this is not a topic of discussion with the people who make decisions at Sketchup.

Any suggestions where to go?