To upgrade Newsletter by Supsystic plugin free version to the commercial you need to -

1. Install latest free version of the plugin here: https://wordpress.org/plugins/newsletter-by-supsystic/

2. Then download commercial version from your personal account: http://supsystic.com/login/

!Important! You need both versions to be installed. Free and commercial one.

== Changelog ==
= 1.0.10 / 23.06.2020 =
 * Minor issues fix
 * Add gateway activation
 * Remove CDN option
 * Change gateway server
 
= 1.0.9 / 14.01.2020 =
 * Minor issues fix

= 1.0.8 / 14.05.2019 =
 * Fix for temlates
 * Minor issues fix

= 1.0.7 / 03.04.2019 =
 * Minor issues fix

= 1.0.6 / 16.01.2019 =
 * Fix of displaying of newsletter form's statistic
 * Minor issues fix

= 1.0.5 / 09.08.2018 =
 * Added check for fields case when importing Subsribers from CSV
 * Fix of notification about license expiration
 * Fix minor issues with Imported functionality (MailChimp)
 * Fixed plugin activating for multisite
 * Minor issues fix

= 1.0.4 / 11.04.2017 =
 * Added some fixes for PRO templates
 * Added new PRO templates - Invoice and Veggy
 * Minor issues fix

= 1.0.3 / 31.03.2017 =
 * Fixed update Pro-templates from site
 * Added new PRO templates 
 * Minor issues fix

= 1.0.2 / 24.10.2016 =
 * Subscribe Forms graphs added 
 * Minor issues fixes

= 1.0.1 / 13.10.2016 =
 * First release
 * Added extended statistics