As you’ve reported no menus, then suggest you re-upload the latest version and then restore the config file, which will allow you to use your current dtabase.
Already made a backup of the database, saved the config file, deleted the old folder
"lists", uploaded one from a new download (3.3.1), restored the config file
Same thing. Next thing to try is to deactivate all plugins, but I cannot even get to the plugins page, no menu!
I’ve used PHPList for years, not very often. With every update and new plugins it is
working worse and worse. Days upon days of time wasted.
I wonder, the last time I’ve logged in about a month ago the menu was still there.
In that case, try a fresh config file, add your correct settings and see if that helps. Sometimes it seems that the older config files have values missing for the newer versions of phpList.
If that doesn’t help, you may need to get someone to take a look to see if they can spot any issues.