LttrInk / Letterink plugin issues

I’m having a few issues with the LttrInk plugin, wonder if anyone here can help.

1 Can’t stop “advert” that appears each launch

Screenshot 2022-08-16 at 16.48.13

2 Plugin stops Show All Instances working

with the plugin enabled:

after removing the plugin and restarting Glyphs:

Thanks in advance.

Eventually the developers responded and suggested [2] might either be a bug or possibly an unforeseen design issue that might or might not be resolved in due course.