In Scaler, select the chord set you want to share and click the export button on the left hand side of the window (see image below) and save the file on your computer:
Once on the forum, create a new topic with a descriptive title about the style/genre of your chord set.
In the formatting toolbar above the text area of your post, you will find an upload button, click on it and upload the .XML file you exported from Scaler. This will automatically create a download link to your file that looks like this:
Ed 1 - Export Demo.xml (1.0 KB)