After upgrading my site to the newest 2.4 version, I noticed my previous themes disappearing. I decided to take a V.2.4 theme and used my own logo on it. I needed multiple versions of the theme so I decided to duplicate it, make the necessary name changes in the lang section, in config.php and then, using CPanel, I uploaded an archive of each theme with appropriate CHMOD 755 setting, uncompressed them . I then whent to site setting, appearance, themes, theme settings, I freed the cache by clicking the appropriate button and... nothing... I tried so many times to check and recheck what I could have done wrong but Nothing. The theme doesn't show up in the list of themes.
I am fed up and hoping that someone here can give me a hand.
Thank you so much...