UHC25,
Sorry that you are seeing this issue. Looks like your installation is broken.
Can you please try to reinstall MyEclipse using the offline installer ? Re-run the installer and either choose repair or install another copy to fix the issue.
If you do not have the installer and working with MyEclipse Blue 2013/2014, please download the installer from here :
http://www.myeclipseide.com/module-htmlpages-display-pid-4.html
If you are working on previous versions of MyEclipse Blue and do not have the installer, please send an email to sales@genuitec.com and they will assist you.Be sure to include your name, subscription id, subscription code, MyEclipse version desired, and operating system so they can provide the correct download link without delay.
Let us know how it works for you.