Plug-ins don't appear in Logic 10.5, Premier Pro 2020, Audition 2020, Cubase 10, Wavelab 10 on MacOS?

With some of the latest DAW releases on MacOS, our older plug-ins (Master Restoration Suite and Dialog) do not draw. The plug-ins process audio, but the graphical user interface is blank, showing a black or grey window. This appears to be an incompatibility between the SDKs used to build our old plugs and the later SDKs used to build the DAWs. There is unfortunately no easy workaround. We are in the process of rewriting all the older plug-ins to use modern Mac SDKs. We plan to release new versions in 2020 to address these issues. This will be a paid upgrade.