I've got that file on my machine here as well.. It's a "journal" file placed by Firefox and is harmless. The reason you're not finding the the "Application Data" folder is you probably don't have all hidden and system files and folders showing in Windows Explorer/Folder Options. Once hidden and system folders are visible, then path you've indicated should be visible.
By the way, I'm not seeing the greatest reviews of the KL-Detector product.. Your choice though..
Hope this helps.
My computer is a Presario M2000 laptop running XP SP 3
I downloaded KL-Detector and ran a scan and got the following:
KL-Detector has found a suspicious file:
C:\Documents and Settings\My Name\Application
This is only one thing that it found; there is also a full log listed.
Is this really a keylogger on my computer? I went to C:\Documents and Settings\My Name and couldn't find Application Data; I did a search and couldn't find it either.