Ah, found the solution I think -
https://forum-next.cabbageaudio.com/t/easier-way-to-share-presets/1223/21?u=fellusive
This seems to resolve the issue of Cabbage freezing up if the user opens a preset that has been saved during the same run of the plugin.
Here is a modified .csd for reference: CustomPresets.csd (2.0 KB)
Thanks for the link to that thread!