Upgrade to Parallels 19

I just got a Mac Studio M2Max and want to purchase the 1-time upgrade to Parallels 18 at the end of June. It seems likely the Parallels 19 version for Mac Sonoma will be released in August going by prior precedent. Would I be eligible for a free upgrade from version 18 to 19, or would I have to re-purchase 19 (non-subscription)? I just started the 14 day trial today and must say how easy it was to install Windows 11 on my Mac, and how well it runs in Mac Ventura.