As there were few post on the site I thought I would add this, as it seems to have disappeared off the Wersi website.
NOTE:As it starts from the latest update first it may be better to start from the bottom.

All the updates were free (Various options also became available over time, and like all manufactures are cost options. NOTE: Wersi also allows you to trial the options with a free trial code to see if it suits what you want) until V3.00 when to get the best out of it you had to purchase at least the Wersivision.
NOTE: There are no official V3.00 demos as yet, only user posts on You Tube.

Enjoy

Bill

Wersi OAX Software Updates