Error message: 'Can't find script engine ...'

[mestre]

Hi there,
I have updated my Media Monkey with the latest version today 4.1.11.1783 (after 3 years without using Media Monkey) and I got this message when trying to open it:
Error message: 'Can't find script engine ...'
I've tried to follow the instructions found here:
http://www.mediamonkey.com/support/inde ... ipt-engine

and found these keys/values on my registry:
[HKEY_CLASSES_ROOT\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32]

NAME TYPE DATA
(Default) REG_SZ C:\Windows\system32\vbscript.dll
ThreadingModel REG_SZ Both
______________________________________________________________________________________

[HKEY_CLASSES_ROOT\CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32]

NAME TYPE DATA
(Default) REG_SZ C:\Windows\system32\vbscript.dll
ThreadingModel REG_SZ Both
______________________________________________________________________________________

[HKEY_CLASSES_ROOT\CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32]

NAME TYPE DATA
(Default) REG_SZ C:\Windows\system32\vbscript.dll
ThreadingModel REG_SZ Both
______________________________________________________________________________________

[HKEY_CLASSES_ROOT\Wow6432Node\CLSID\{B54F3741-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32]

NAME TYPE DATA
(Default) REG_SZ C:\Program Files\AVAST Software\Avast\AhAScr.dll <--------------------------------- ?????
Default Engine REG_SZ C:\Windows\SysWOW64\vbscript.dll
ThreadingModel REG_SZ Both
______________________________________________________________________________________

[HKEY_CLASSES_ROOT\Wow6432Node\CLSID\{B54F3742-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32]

NAME TYPE DATA
(Default) REG_SZ C:\Windows\system32\vbscript.dll
ThreadingModel REG_SZ Both
______________________________________________________________________________________

[HKEY_CLASSES_ROOT\Wow6432Node\CLSID\{B54F3743-5B07-11cf-A4B0-00AA004A55E8}\InprocServer32]

NAME TYPE DATA
(Default) REG_SZ C:\Program Files\AVAST Software\Avast\AhAScr.dll <--------------------------------- ?????
Default Engine REG_SZ C:\Windows\SysWOW64\vbscript.dll
ThreadingModel REG_SZ Both
______________________________________________________________________________________

OS is a 64-bit Windows 7 Home. I've used to have Avast but now I use Kaspersky Internet Security.
In regedit, I've tried to remove the AVAST entry in InprocServer32 but, although I'm an administrator, it didn't let me modify the key..

ANy help would be much appreciated!!
Cheers!!