Having un installed the old version and wanting to update to the latest, on instaling via ZIP it says one plugin installed correctly, but it never shows, even if you restart the app.
I've also tried using FTP to move the files manually, but the plugin never shows in the list.
I am not completely following what you are trying to achieve. A start would be some details of what you have running Are you just trying to install the square plugin? or and the theme. When you downloaded the zip files did you unblock via the properties?
Then use the install from zip button within the backend of the site, but it never shows in the list to install. It says it's installed it, but it's just not there at all.
Thanks for the response, Im struggling to see where legacy versions of the nop square plugin are downloaded from though? I've been though the zip and copied the 4.2 version across from within the xip via FTP, but that didn't work.