Since my mostly-ngclient issues got moved to their own topic, I’ll copy this back for ngax:
I’m not sure what you found, but an attempt at a large-deletion fix was already done here
Regarding “Export to file” names, Duplicati used to change space to plus sign, and it now just leaves spaces. I exported from 2.1.0.112 in ngax as a precaution, but it’s in 2.1.0.108.