I think it is not about a “savings version”.
I think the wish is to get Kurviger online routing (additionally to the available routing algorithms), and pay even an extra fee for this.
Cruiser is a great navigation tool just like Kurviger2 was, but you can’t plan routes directly on it with Kurviger routing algorithm. If you want to use Kurviger you need to go the detour via the website.
Automatic recalculation isn’t possible either without losing your curvy route AFAIK.
PS: My best option so far is the trick from @zaphod_42 to prolong Kurviger2 until the end of 2023.
Unfortunately this seems to work only for Germans and Israeli.
Thanks Wolfgang!