Follow the below steps: 

1)Open the below directory;

C:\ProgramData\SafeNet Sentinel\Sentinel RMS Development Kit\Tools

2) Rename “LMLICGEN.USR” to “LMLICGEN.USR_Backup”

3)Rename “wlscgen.ini” to “wlscgen.ini_Backup”

4) Re-launch “wlscgen.exe”, it will prompt to enter the new password for Administrator user.