NOT 'good news' then, I suppose...

That's kind of the problem with 'soft' arrangers and open ones. The software has to be continually upgraded to run newer host OS's, newer VSTi's that HAVE to run on the latest OS of Windows, Linux, bugfixes to older VSTi's and upgrades to them (which are usually only able to run on the latest OS), etc..

Not much different to having a 'closed' arranger, to a certain degree. Windows and OSX and Linux tend to move forward at quite a clip. Once your manufacturer stops keeping up with them, it's not too long before only legacy software will run on your arranger.

I hope you have your Wersi upgraded as far as it can go, Bill... Looks like possibly the end of the line. A sad day.