FTP plugin upload is not optimal because I’m managing wordpress and plugins across development, staging and production using git.
Nevertheless, I did as you suggested — deleted the plugin, installed via FTP — and had the exact same problem.
Maybe the issue has to do with whatever you’re using to create the zip files? I’ve never had this problem before.
I created the folder hierarchy manually based on the file names in the plugin, and now the plugin works as expected.
There is another issue, however: Using the AddOns dashboard menu sometimes returns a “form save error.”
http://monosnap.com/image/wWp8bTNf8JwwE8A2nHbyReX3EQBzLI
It does this with both add ons I have installed. The good news is, it only seems to happen when you hit the Save Settings button without changing any data in the fields. When you actually change a setting and hit save, it works as expected:
http://monosnap.com/image/QiMpTJToLULdbp8s3EcmVInhFiJQQ8
Thanks again.