I'm using a very old version of Aquamail (1.6.2.9), from before the Mobisystems acquisition. At the time I really liked the independent license system, since many of the devices I use do not have Gapps on them.
Unfortunately, one of my email providers is now refusing to allow it to connect. (Could be the TLS cipher, could be expecting OAuth or something, still waiting to hear from them on that)
So it looks like I'll be forced to upgrade it on a device which has no Gapps on it. There is an "AquaMail Pro Unlocker" on my Gplay account, but that cannot be installed on my Gapps-free device. Not sure how I would license it for that device.
Secondly, I have a lot of accumulated data on that instance of Aquamail, eg from POP accounts, which doesn't get re-synced on a new install. There is an export/import function, but do the modern versions accurately import such backups from v1.6.2.9? I have a number of accounts and aliases configured, I'd hate to start from scratch if possible.
Thanks in advance for any suggestions.