As i said in my first post the User Dictionary Manager doesn't work. The develloper even said it:
"It seems some HTCs do not implement the standard Android framework. If you are experiencing problems and you are using an HTC then please just uninstall the application. Unfortunately, this is not a developer error, it's a firmware issue.
If HTC will implement the standard Android in a future firmware, then this application will work.
Without a new firmware from HTC this application cannot work.
HTC Desire - does NOT work"
Is there another way to edit your list of words?