The log files are located in C:\Users\username\AppData\Local\Novell\Filr.
The AppData folder is hidden by default. To access the folder, type the following in the Windows Explorer address bar:
%LOCALAPPDATA%\Novell\Filr
The following are the log files:
Merged View - %localappdata%\Novell\Filr\filr_dialog.log
Sync App - %localappdata%\Novell\Filr\filr.log