Vimix theme needs updates for Cinnamon 6.4

[thegreatyellow67]

Hi, I'm a big fan of Vimix theme in Cinnamon. I have a linux machine with LMDE6, recently they updated cinnamon to the latest version 6.4. After updates, I realized that the new modal dialogs (confirmation dialogs, auth dialogs, system dialogs, volume popup, etc) don't look as expected. I contacted the Cinnamon team and they answer to me:

Yes, it's up to the theme developer to update their theme. see linuxmint/cinnamon-spices-themes#843

Here are some pictures of how the new dialogs look like.

How is it possible to make a GTK theme compatible for older versions and the new version 6.4 of Cinnamon?
Thanks in advance!
Congratulations for your great work!!!