I have tried a couple of times to import my backup from 2.4.1 to the newest version of cnmaestro with no love. I get a quick error that tells me that is is only possible from 3.0.1 and up. Please tell me there is a relatively painless way to do this. Please!
Not without major manual data transformation. 2.4.1 to 3.0.1 had lots of database changes. This is why Cambium sometimes recommends intermediate upgrades first before attempting the final upgrade. Spin up a 3.0.1 vm, dump the data into it, then upgrade to 3.1.1. That will save lots of heart ache.