3.1.1

• Fixed hash_equals() PHP warning (thanks, @connorblikre!)

3.1

• Added link to refresh lists
• Added support for Gravity Forms 2.3 encryption
• Fixed fetching lists for usernames containing non-alphanumeric characters

• Fixed undefined index for username and password when setting up for the first time
• Fixed PHP 7 code warning
• Thanks to @fluiditystudio, @michaelw_dc, @codezen8, and @jeffhertzler for head-starts to bug fixes
• Allow users who have manage_options permissions to access settings and form settings

3.0

• Completely rewritten to use the Gravity Forms Feed Addon 2.0. If you are upgrading, check your feed configuration!
• Now requires Gravity Forms 1.9.14+

New Features:

• Add subscriber to multiple lists at once
• Use complex Opt-In Conditions (before, plugin only supported one condition)
• Encrypt Constant Contact login settings
• Improved restriction of settings page
• Fixed bug that prevented emails with plus signs (+) from being processed properly
• Confirmed compatibility with WordPress 4.7.2
• Added improved logging
• Added translation strings

2.2.2

2.2.2 (August 11, 2015)

• Fixed: Invalid login issue (thanks @robertark!)
• Confirmed plugin compatibility with WordPress 4.3

2.2 & 2.2.1 (January 5, 2015)

• Fixed: Fatal error on activation for plugins located outside of /plugins/ directory
• Modified: Converted API to use WordPress remote request functionality - now works with or without curl enabled.
• Fixed: PHP notices
• Tweak: Replace some images with Dashicons
• Tweak: Update Constant Contact logo for Retina displays
• Removed PressTrends reporting
• Added: Intro to GravityView plugin
• Tweak: Only fetch the API if a feed is going to be exported to CTCT

2.1.2

• Fixed: Some servers are very sensitive to the fact of posting a form where some values are urls (in this case, the Constant Contact list endpoint). This version replaces that way of posting and adds three new methods to convert endpoint's in short id's and backwards.
• Fixed: Minor corrections (html, PHP warnings)

2.1.1

• Added: gravityforms_constant_contact_change_date_format filter to enable changing the format of the date field export to Constant Contact.