I was able to upgrade my ISY to 3.1.12, and install the ELK Module without any issues. When I go to the Security System tab, none of the information related to my Elk is populated - everything is empty and only the column labels are displayed. An additional issue is that the M1G integration module for Homeseer no longer works to control my lighting through the ISY. This was not an issue before 3.1.12 and the Elk module. I will continue to do some troubleshooting to see if I can determine where things broke.
EDIT: I see that I have to include my alarm code in the saved configuration. I now have all of the information related to my Elk populated, but still can't get Homeseer/Elk to control the lighting through the ISY.