I have been running Myclientbase for over 12 years which is what Invoiceplane was forked from
Im 80% done with some scripts that export all the tables (well excluding settings and custom fields) to SQL scripts that import to Invoiceplane
I would be amazed if anyone is still using Myclientbase but happy to share if needed.
I’m creating this post to say hello to the community and some google results for Myclientbase