Why do I keep requiring to enter the purchase code and now that I did I cannot update to 6.16 I am having problems with just one of three I purchased.
Envato purchase code is the key of License. purchase code required to get verified the purchase.
To get auto update features you can use Envato Market WordPress Plugin. This plugin helps customers receive updates to their premium Themes & Plugins purchased through Envato Market (ThemeForest & CodeCanyon).
Please download the plugin from here:
otherwise you can download the update version from Envato Market download page and update manually using ftp.