OptiM was authored as an MS Windows centric application starting in the early 1990s by Valeri Lebedev (val@fnal.gov); he continued to maintain and further develop it until 2014. The original code relied on the Borland C++ OWL framework which is now obsolete and no longer available as a commercial product. During the last quarter of 2014, the OptiM code base was ported to the multi-platform Qt framework and modified to better conform to modern C++ usage by J.-F. Ostiguy (ostiguy@fnal.gov). Both the look-and-feel and functionality of the original Windows/OWL application have been preserved.