How to upgrade v5.7.0 to v7.7

booklet

Hi everyone.
I'm sorry if this has already been mentioned anywhere, but I've been hunting for a solution on the web for days and couldn't find any.
I have completely redesigned the website of a client. The old website has v5.7.0 installed. The new website has v7.7. I'd like to copy the content of the acymailing tables (user, etc.) from the old database to the new one. I've understood there is a migrator if the original version is v5.9.1 or higher, but neither the old website admin panel allows me to upgrade to this version (5.7 shows "version up to date") nor I can find the 5.9 install files anywhere. The support is also not responding.
Any idea on how I could proceed?
Thanks in advance

mihha

You should install version 5.9.1 or higher, so you can download the latest version from Acyba site and install it manually using Joomla installation manager

booklet

Thanks Mihha, that was clear to me but I couldn't find where to get the latest v5. For those that may be stuck at the same step, here is the way forward:
1/ create an account on the www.acymailing.com website
2/ go to Licenses > Starter > Download
3/ after choosing the CMS, it is then possible to get either v7.7 or v5.10.

mihha

I am glad that you managed to resolve the issue