- Server Maintenance - every Tuesday for a few hours (except in some rare occasions)
- Festivals - Every 4-5 weeks (during the above maintenance)
- Major Content Updates - Since Chapter III these on average occur three times a year
Occasionally there may be other smaller updates or fixes, again these tend to occur during scheduled maintenance.

He means to download a fresh client & let it patch:
http://us.runesofmagic.com/us/client-download.html
or
Manual Downloads for the 5.0.5 RoM Client

I'd say it's definitely best to remove the old client first.

It's always been the case that you can download the client without creating an account - you just needed to log in to the website first.
This post has been edited 1 times, last edit by "LT72884" (Jul 18th 2013, 12:08am)

