Since MacOS Big Sur Came out I decided to go cold turkey on the Virus TI plugin. Tried a couple midi editors available and eventually settled on the one I bought ages ago: The Virus HC by Mystery-Islands.
Now to be absolutely honest: it's not perfect. Saving patches does not really work well and you can't tweak knobs while playing midi at time same time because it causes midi hiccup, but to be honest all I really need is that my sounds load automatically when opening songs, and somehow it does. (like 90% of the time)
I'm now one week in, and I already have three songs midway-finished, so my productivity is back to normal.
My tip for all of you Virus TI users: stop waiting for Access to release their updated plugin. It just won't happen. It's either time to let go of the Virus TI completely, or as we say in dutch: ''roeien met de riemen die je hebt'' / ''row with the paddels you got'' and use the Virus as a midi instrument as it's still a great sounding synth.
As for opening my old songs (I've been using the Virus TI since 2013 in my productions) , I still have a working MacOS Mojave partition on an older Mac, and I'll need to schedule in a couple days, or (probably) even a week, to export the those old Virus TI stems into audio, just so I can reopen them on my Macs from now on.