I had to wipe my Mac, when I did, I did not want to bring over all my apps. I think one of them was causing an issue. So, I am redownloading them all and installing them all and my BetterTouchTool is unable to be downloaded again. I had the last version before a monthly fee was made. I had paid for it, but do i have to pay again to get it again or can I download the version I had? Of course, I have no clue what number that was. Yeahaaa! LOL
You should be able to just download it again, if your license does not work for the most current version anymore it should allow you to downgrade.
I believe this is the last version for your license: https://folivora.ai/releases/btt3.364-1581.zip