Ah, thanks for reminding me about WordTsar. I downloaded the alpha version (0.1.74.67) in 2018, briefly tried it out and forgot about it. I see from the your link that the version I have isn't even on the website it's so old, the current being 0.3-136. I'll try it out in a moment.

The alternative WordStar that I had (and is still) running on my PC under Windows before I saw WordTsar in 2018 runs under vDos, info here (it seems that now this is only useful if you have an old version of Windows (I'm still using Win 7). Still, it may be useful if you have an old machine hanging around:

http://www.wwwriters.com/ws6-win7-vdos.pdf

https://sourceforge.net/projects/vdos/

There is also this link which may be useful:

http://www.dosbox.com/download.php?main=1

Here's a commercial site that I've not seen until now. It looks like you have to pay for this version here but the site seems to have some good info and a few links that may be useful:

http://www.wordstar.org/