According to what I found, your default router address is 192.168.2.1
Typing that in the browser SHOULD get you into the router. If not, then you'll need to do a hard reset. If it still won't work, try changing your computer's IP address to 192.168.2.100 with a subnet mask of 255.255.255.0 (and turn off DHCP). DNS and Gateway are not important right now.
Then try to access 192.168.2.1
If you get in now, make sure you enable the router's DHCP (you may have disabled it while playing around) and when you're done restoring all of the settings, reset your computer's IP settings to DHCP and hopefully this will take care of things.