Description of problem:
I have installed Aqua Data Studio which is proprietary software and have not packaged to rpm. It is installed in /opt.
Then I want add entry in menu.
Start, add it, update and... nothing.

Version-Release number of selected component (if applicable):
$ rpm -qf `which kmenuedit`
kdebase-workspace-4.7.2-14.fc16.x86_64

How reproducible:
Always

Steps to Reproduce:
1. $ LANG=C kmenuedit --nofork
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.

2. Add any entry. Fill name and run command.
3. Press save button. Saving and database update indication appeared and in console:
kmenuedit(4824)/kdecore (services) KServicePrivate::init: The desktop entry file  "/home/pasha/.local/share/applications/Aqua Data Studio-7.desktop"  has Type= "Application"  but no Exec line 

X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 20 (X_GetProperty)
  Resource id:  0x20000be
X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 20 (X_GetProperty)
  Resource id:  0x2000104
  
Actual results:
Nothing more. No entry in menu.

Expected results:
New created entry.

Additional info:
Digit in /home/pasha/.local/share/applications/Aqua Data Studio-7.desktop continiosely increased, so, files created.
No any manual menu manipulations was done previosely.