Security Manager 5.x
Security Manager 6.x
To resolve this issue, you will need to modify the nqconsole.exe.config file. Do a search on the file system for this file. At the bottom of the file there are two lines that look like this:
If one of those is set to true, that's why the password prompt comes up multiple times. Set both values to false and this should resolve the issue for you.
The prompt can be set to always display at launch in the configuration file.