Hi, actually, only pro version has a custom upgrade option, the version here updated through wordpress.org like every other plugin here. However, recently we got the report from few other users too, auto-update for pro version fails sometimes, we checked the issue, found, sometimes it fails due to file write access permission on the server. However, we already resolved the issue and it is fixed for next update. FYI, the auto-update failure will not harm any of you data, you can always update the latest version manually by downloading it from the premium download area. Thanks.
Firstly I followed the “review my plugin” link from your plugin page on my site. This is a paid plugin and my opinion remains the same. Others will make up their own mind based on a range of views – and the responses you give.
Thanks for your review, any feedback from users helps us to improve the features and fix any existing bug with the next update.