Instructions: Unrar and install the application. Delete created by default .net native image. Run as admin command prompt (cmd.exe) and execute command: C:\Windows\Microsoft.NET\Framework64\v4.0.30319>ngen uninstall SAP2000 Run \patch\sap2000_v23_kg.exe A license file (lservrc) will be generated. Copy both generated above license and applied emulator (SentinelRMSCore.dll) to the folders: and \CSiLicensing\ NOTE_0: allow program's access to the internet otherwise program will not even start. NOTE_1: you can try to replace SentinelRMSCore.ni.dll besides deleting native image - program will start much faster. But the good result is not guaranteed. The program may not even start. On what does the success depend on is a big question at the moment. So replace C:\Windows\assembly\NativeImages_v4.0.30319_64\SentinelRMSCore\bla-bla-bla(depends on product)\SentinelRMSCore.ni.dll with \patched\SentinelRMSCore.ni.dll NOTE_2: do not use Windows Explorer for replacing SentinelRMSCore.ni.dll. No chance to do this with it. Use Total Commander (for example) with turning on option for showing hidden files.