Can't remove Addon settings?

Dear Experts - I had succesfully (?) installed the Addon Wireless Router
GWAR3000 as a connected LAN and could read files and transfer data via
the wireless link. It appeared to only grant a "licence" for one hour
and would then lock me out. When I now try to delete all previous
settings, Wired LAN settings to Router, etc. I'm "refused connection"
whne trying to access router via browser. How can I remove all previous
and start again, please?
Spec is Windows XP Pro, AMD 2600+, 512 RAM. 802.11g Router and miniWAN
on 2nd machine.
Haven't got B/Band yet so not worried about adding Internet access to WAN.

All help gratefully received.
David in Norfolk UK

--
Those who hear not the music think the dancers mad...

--
Those who hear not the music think the dancers mad...