source: https://www.securityfocus.com/bid/13559/info

It is reported that Positive Software H-Sphere Winbox stores user account information in a plaintext format inside of application log files.

As a result, user credentials could be exposed to other local users who have permissions to access the log files. 

C:\HSphere.NET\log\action.log
C:\HSphere.NET\log\resources.log