Affects VST2 & VST3 Dub Machines ONLY (not AU).
If you save a preset with a version 1.3 Plugin, then go back to using an older version of the Plugin (e.g. version 1.1), the preset will not load correctly and it will not warn you about this.
Therefore, if you are in this edge case scenario, be sure to ‘Save As’ and be prepared to manually reset presets.