If you are upgrading to eGuide 2.1, you have an option to keep or to overwrite your existing eGuide directory structure.
During the eGuide 2.1 installation program, a Backup Existing Settings (Recommended) checkbox is made available. If you check this box, the following occurs:
If the config_old, plugins_old, and templates_old directories already exist, then your current versions of the config, plugins, and templates directories are renamed to config_old2, plugins_old2, and templates_old2. If directoryname_old2 already exists, the files will be renamed in sequential order all the way to the number 99. If you are unsure what your newest installation backup directories are, look at the directory timestamp.
NOTE: In eGuide 2.1, XML files are being used instead of SER files.
If you don't check the Backup Existing Settings (Recommended) box, your existing properties directory is deleted and the installation continues.