The name of the CPLEX DLL looks like this: cplexXXX.dll where XXX represents the current version number. The CPLEX library on Windows is a DLL file. If you see a message that the app can’t be opened because it’s from an unidentified developer or wasn’t downloaded from the Mac App Store, you can open the app by overriding the. Show the downloads list by clicking the Show Downloads button, then click the Resume button for the paused download. For more information on the CPLEX feature on the Windows platform, see. You can launch the IDE using a Start Menu entry: Start All Programs IBM ILOG CPLEX Optimization Studio edition CPLEX Studio IDE. During installation you may have selected a different installation location (installdir).IDE. Development Tools downloads - IBM ILOG CPLEX Optimization Studio by IBM and many more programs are available for instant and free download. As you design your own make files for your CPLEX applications, it is a good idea to start from one of those sample make files and adapt it as needed. CPLEX is delivered with an assortment of sample make files that accompany the examples delivered with the product.