The CleanerDestinationPath keyword sets the default path on a Windows workstation where clips are saved after encoding by Cleaner XL.
The default path you enter appears in the Cleaner Destination Path field when you select Cleaner in the Format Box of the Image Export menu. You can edit the path there. If there is an ftp path in the output profile, the ftp path is used as an additional destination for encoded jobs. See your application help.
By default, <path> is set to C:\Tmp, which is the default file path where Cleaner XL saves exported clips after encoding.