Search a bit in the forum, there are posts about changing the plugin identifier inside the Renoise song.xml and - if you did not use automation on a VST effect - you also can use the copy-paste-xml buffer of Renoise.
For really incompatible version updates, you can often install multiple versions side by side on macos, then you will have to rename the .vst (and I think also to change the id in the Info.plist inside the .vst) and then patching the song.xml accordingly.