File Scanning in %appdata%

[stefanza]

I’m trying to scan the file “%appdata%\mozilla\firefox\pluginreg.dat”, but the scanning can’t found it. I’m sure the file exist in these path.
What can I do?

[Hemoco]

currently only the following variables are supported

%programfiles%
%windir%
%programfiles(x86)% (beta version 4.1)