I purchased Parallels Desktop 16 for Mac in 2020. I deleted it for some reason three months ago. But today I tried to install Parallels Desktop on my computer. I found the registration key in the mailbox. After entering it, I was reminded that this is the code for the old version, I need to buy the upgraded version. "This key cannot activate the current version because it was created for an older version of Parallels Desktop." In 2020 I was told it was a permanent version, I wonder if I could use my old code to use it now. If not, I wonder if I can get the upgrade version for free, for the reason that you promise I could use it permanently. The picture is the receipt.
