To register the license for the Oxygen XML WebHelp plugin for the DITA Open Toolkit,
follow these steps:
Open the DITA_OT_DIR/plugins/com.oxygenxml.webhelp directory and create a file called
licensekey.txt.
In this file, copy your license key that you purchased for your Oxygen XML WebHelp
plugin.
The WebHelp transformation process reads the Oxygen XML WebHelp license key from
this file. In case the file does not exit, or it contains an invalid license, an error
message will be displayed.