Only versions released after 9th Oct 2017 will function correctly in High Sierra and FCP X 10.4 In Earlier versions you may experience crashes when applying a small number of the effects. To apply this update you do not need to uninstall your plugins, please download and install them again.
If you have not updated to the correct version you will see this warning message when starting FCP X 10.4. Installing the versions below or a later version will restore usage of these plugins and remove the warning.
Please note that if you do a clean install of High Sierra you will need to re-enter your CoreMelt serials again so please do make sure you have them before updating.
Please download the latest version here, please note that the Everything Bundle installer will update all plugins and during install you can select "custom install" and de select the products you have not purchased.