The 2.0.3 installer finished successfully (I only installed the VST3, not the CLAP) on my Windows 11 system but the Floe.vst3 file was still the old version.
I have been upgrading Floe steadily but have not had the time to use it much so I have not paid attention to the version in the plugin window until now. Moving the vst3 file out of the VST3 folder solved it, i.e. the installer put the new file in there.