The latest version of QuickRef is R8.9.

END OF SUPPORT DETAILS:

Chicago Soft is committed to supporting versions 8.0 and newer (R8.0 to R8.9). We typically will not write a fix on any release other than the two most recent releases.

Currently, that means we would write a fix/apar for R8.7 and R8.8, should a bug be found. For older releases, we would request that a customer move to the current release.