1. uninstall ALL TRACES OF BENTLEY SOFTWARE FROM THE SYSTEM 2. GOTO CONTROL AND UNINSTALL 1. STAAD PRO AND 2. BENTLEY iEG LICENSE 3. GOTO RUN 4. TYPE REGEDIT 5. oPEN hKEY_LOCALMACHINE\ THEN SOFTWARE - THEN DELETE BENTLEY 6. THEN IN THE SAME REGISTRY SEARCH FOR WOW6432 - THEN BENTLEY THEN DELETE 7. GOTO C:\WINDOWS\SYSTEM32 SERACH FOR TWO FILES - IEGLicLib.DLL OR Bentley.licl ib.DLL IF U FIND THEM DELETE THEM 7(a) goto c: \windows \system32\SYSWOW64 SERACH FOR TWO FILES - IEGLicLib.DLL O R Bentley.liclib.DLL IF U FIND THEM DELETE THEM 8. THEN GOTO C:\PROGRAMFILES(X86) DELETE BENTLEY RELATED FOLDERS NOW ALL THE PREVIOUS VERSION OF STAAD ARE REMOVED 9. THEN THE PROCEDURE IS as follows Install license tools, then install STAAD.Pro Replace "C:\Program Files\Common Files\Bentley Shared\IEG\IEGLCS\Bentley.liclib. dll" with supplied one. Click staad.reg to update your registry.