Thanks.
Note that installing over the existing program did not update it to the new level. A second attempt offered the remove option which I did and the subsequent install was required to bring me to the new level (1.6.3021.30666).
The new date features now show up now great! HOWEVER (that's a big however) -
When I add date variable to my date range parameter, it only works while within the Logicity Solution Builder with the Execute RRD command. If I save changes and run the RRD on a schedule or reopen it in the Solution Builder, it prompts for the again for the date parameter, essientially forgetting the "Specified" setting and going back to "Prompt User".
I checked the RRD in Notepad and can see that the date variables are indeed in the file, but when it is reopened and I edit or run the RRD - the "Specified" setting is lost. Easily reproduceable.