Please find full information about the update with screenshots of enhancements on KVS forum: KVS 6.3.1 update.

Whats new in KVS 6.3.1:

1. In System settings you can now set a path to Maxmind DB file on your server for GEOIP detection. New PHP versions do not have built-in GEOIP module anymore, which makes its installation a bit difficult. Now you can use free Maxmind databases without the need to install any additional modules.
2. An ability to block your site for certain countries or states (for USA, Canada and Australia) was added into Website settings GUI. There are 3 modes to implement blocking: showing 403 error for blocked locations, redirecting them to the given URL, and setting predefined template variable while showing your site as before. This template variable can be however used to show blocking GUI on top of your theme per your own design.
3. Importing feeds will now allow filtering content by their quality, e.g. you can limit away videos of too low or too high quality if needed.
4. Mass edit GUI will allow re-creating video formats without applying duration limits configured in them. This is especially useful, when you have duration limits configured in video format settings and no video source files are available.
5. We imposed stricter rules on administrator passwords so that one cannot set a very easy password anymore. For limited admin accounts you can now restrict their account usage to a fixed IP to prevent it from being hacked in any way by another party. If there is a bruteforce attempt detected, KVS will show a notification informing you that you may need to change your account login.
6. In list_videos and list_albums blocks we added sorting for the most purchased videos by today, week and month.
7. Admin panel start page got some visual optimizations to reduce the display of useless information.

Bugs that have been fixed:

1. [MEDIUM] Dozens of bugs related to system changes in 6.3.0. We won't list them all, as most of them are visually confirmed when you face them, and thus you know there is an issue with something.
2. [MEDIUM] Albums import may result in wrong image sorting (after 6.3.0).
3. [MEDIUM] In one of our previous updates synonymizer plugin stopped working correctly for albums.
4. [LOW] Content check on backup servers didn't work correctly (after 6.1.0).
5. [LOW] Admin panel login page will now serve 404 error when being accessed on alias domains, rather than doing redirect to the primary domain.