Uninstalling Instruments and/or SINEplayer
To uninstall an instrument from within SINEplayer, you can either delete the whole collection from disk, or delete its individual mic positions.
To uninstall SINEplayer, uninstall the software from Add/Remove Programs (Windows) or move the .app to the trash (macOS).
On macOS, you will also need to delete the plugins, which you'll find under Library/Audio/Plug-ins/VST and Library/Audio/Plug-ins/Components. Delete the SINEplayer file from both of them. This step is not needed on Windows.
On both Windows and macOS, then manually delete the SINEplayer Data Folder.