DO11: Can't search in Help file


don't know what happend. Can't search in the Help file anymore.
In other CHM-files no problems. Any hints?

Directory Opus Pro 11.7 Build 5372 x64
OS 6.1 (B:7601 P:2 T:1) SP 1.0 "Service Pack 1"

Many thanks and greetings

Please give more details. Is the Search tab still there? Do you get an error message? What are you searching for? What happens?