Sorry there is no such option in the current TLServer version. The file created are all stored in the "Fileservice" subfolder.
One way for you to access the files stored on the FileService folder is to run a FTP server on your PC (e.g. Filezilla SERVER edition). You will then be able to define any folder on your PC that can be assigned a username and password to login to download the file. i.e. The PLC log file so created can be accessed from a FTP client.
Another solution is for the PLC to log the data to an online data logging service, such as the experimental
http://www.plclog.com where the logged data can be accessed from any browser and downloaded as an excel file.