Ok, I will try that.
I was about to do it first, but then I read
"THIS TOPIC IS 1,263 DAYS OLD
As such, information contained within it may be out of date. Please feel free to create a new topic instead if you prefer."
Since the thread has been inactive for so long, and since it's not an easy (at least for me) task to upgrade the template manually, I thought I could go here to look for help. I also contacted the developer Soluna Software. And I have read all the general documents (the link you posted) about the switch between the old and the new runtimes.
But I will do some research based on what you said and try to figure it out.