Version 1.6.6 is now available for download and is an important update as it fixes a critical bug introduced in 1.6.5.
A new shortcode has been adding called mycred_total_points. You can use this shortcode to show the total number of points your users have altogether or show the total amount of points awarded/taken for specific instances.
Note, that the myCred for Visual Composer will be updated to include support for this shortcode.
Event Espresso 4.6+
I was, unfortunately, unable to include a fix for Event Espresso 4.6+ users. The payment gateway system was completely re-written in 4.6 and I have not yet been able to complete the new gateway. I plan on having a fix included in 1.6.7.
Finally, a BIG THANK YOU to everyone who has helped to report issues and solutions!