sanjaygoad,
Sorry that you are seeing this issue.
Can you answer some more questions for us ?
1. How did you install MyEclipse 10.6 ? Is it from All-In-One installer/Pulse or Archived update site on Eclipse ?
2. The issue might be due to incomplete or corrupt installation. I suggest you try a Reinstall of the profile to fix it.
If you have installed using All-In-One installer, try rerunning the installer. You will see options to Repair or Install to another location. Choose Repair to repair your existing installation.
Alternatively you can use Pulse to reinstall ME 10.6. Open the Pulse explorer, Right click on MyEclipse 10.6 under MyProfiles section, select ‘Reinstall and Run’. Follow the wizard and restart the IDE when it prompts.
Let us know how it works for you.