WHMCS SSL certification can be disabled by using a default setting
Date range bugs were fixed
Billing crontab proxy support (very useful when you have a cluster)
Support to get fixed payment amounts.
Amazon MariaDB 10.2+ support.
CSV support to the HTTP export script.
Minimum payment support per plugin.
Deals support, you can now give first X minutes to a prefix at a flat rate.
Better billing by item.
Fix a bug with the currency API.
Export your selling rates in JSON format.
Force payment in full.
Static items charge logic fixed.
Some bugs when you create a new billing profile were fixed.
New support to charge for short calls.
More default settings to customize WHMCS integration.
Database currency rate cache. Use the following default setting category: 'billing', subcategory: 'currency_database_cache_ttl', type: 'numeric' to specify a TTL (in seconds). If you specify a negative number, the cache won't expire. You can manipulate this table to use your own rates.
Multiple fixes when using account code different than the domain.
More WHMCS work to make the integration easier. Billable items can be pushed to be invoiced on the next cron, next invoice or a fixed due date.