Are you sure you are using DW CC and not CC 2014.1?
There is a bug in DW CC 2014.1 that we are currently working on updates to fix, this error sounds like that bug.
We hope to start having updates available soon to fix this.
The item for $45 in your upgrade section is not the eCart upgrade, it is for the eCommerce Webinar, this shows for all customers who have cart regardless of version, but is included in cart 6. go to the eCart download page to access the link for the webinar recording.