Beware, it seems that this plugin is no longer updated.

Yes, this was last updated 11 months ago so not looking good. Also I have been getting automated emails about an error:

An error of type E_ERROR was caused in line 227 of the file …wp-content/plugins/comet-cache/src/includes/traits/Shared/CacheDirUtils.php. Error message: Uncaught Exception: Unable to delete files. Rename failure on tmp directory: … and it goes on.

Yeah, and they’ve abandoned their paid pro users, too. Such a shame.

Seems like it, even paying users don’t get support anymore.
The support links provided on the customer pages lead nowhere, nobody answers in the forum anymore and if you dare to ask what’s going on, the forum account is set to “on hold”.

The e-mail deposited in the paid customer area also no longer works, comes back as undeliverable.

Pity, was a good plugin for a long time.
And the behavior of the 7 of the developers is unfortunately negative advertising for paid WordPress plugins. Here the WordPress developers should take a better look at it.

Translated with https://www.DeepL.com/Translator (free version)

Try Rapid Cache, it’s newly created fork of this plugin.

As a note, I checked with WP Sharks and this plug-in is still supported.

The website needs some fixing, but they are still around.