Xailer Portable is basically the possibility to use Xailer from any data device regardless of the machine where you are running the IDE itself. The device can be an external hard drive or a simple pen drive. Xailer registers itself to be used from that device only, but being connected to any PC.
Xailer Portable is only available for users who have a professional or Enterprise license of Xailer version 2.3 or above.