I installed Crossover from AUR using yay -S crossover. When Crossover updated to a new version, I couldn’t use it anymore because my license was for the old version.
First, check your yay cache in ~/.cache/yay/crossover and see if you have a package for the old version there. If so, install it with yay -U /path/to/package
If not, try downloading the 3 files from here into a folder. Then open a terminal cd into that folder and type makepkg -si
Add the package name to the Ignorepkg line in /etc/pacman.conf. Also remove the # from the beginning of the line if there is one.