Koji Advance problem on Big Sur

Hi. I've been using Koji advance for many years now. I recently upgraded to Big Sur and it stopped working. I've tried contacting Crumplepop.com who made the plugin for Final Cut Pro a number of times but they take for ever to respond and each time they do they just send an automatic message telling me how to reinstall the plugin using FxFactory. However, as I have tried to explain to them I purchased the plugin from kojicolor.com years before the plugin was sold through the FxFactory store, so I do not have a product license that I can use with FxFactory. Can anyone help please? Thanks

And therein lies your problem, you have a very old, outdated version of a plugin. Sucks, I know. Crumplepop has been good to me in the past, but this sounds very frustrating. You should at least be offered an upgrade path that doesn't break the bank.  Their social media seems to have not been touched in ages, either. Is there a way to contact FxFactory support and let them know what's going on?