Thanks for the ideas, Everyone. I haven't found a solution. SAS Deployment Manager clearly does not give a choice between versons of SEG. My choice is either Base SAS, SEG, or SAS Universal Viewer. Once I set that option to SEG and then double-click a .egp file, I get a Windows prompt that asks, "How do you want to open this .egp file?" EG7.1 and "More apps" are presented as my options. When I expand the More apps option, I get a list of many apps (some of them SAS apps) but EG8 is not in the list. When I click on, "Look for another app on this PC," I navigate to C:\Program Files\SASHome\SASEnterpriseGuide\8\ and double-click SEGuide.exe. That starts up EG7.1! The .egp file is listed in Windows Explorer with an EG8 icon. Interestingly, If I navigate in Windows Explorer to C:\Program Files\SASHome\SASEnterpriseGuide\8\ and double-click SEGuide.exe, EG8 starts up! Also, if I right-click on an existing .egp file, I have options to "Open with SAS Enterprise Guide 7.15" and a separate option to "Open with SAS Enterprise Guide 8.3." Both of these options work correctly. It seems like we're going to have to uninstall EG7 to get the default to switch to EG8.
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