cant install new patch from server restart 10 mins ago

hello im new to warmane, i just waited 3 hours in que as soon as i logged on (1st time ever) there was server restart, now when i try to start game it downloads a patch but then gives me this erro,r the installer does not need to be applied it requires a wow.exe older than version 5.0.0.0 but you already have a version 6.2.4.21742.

Any help would be greatly appreciated

Do you have battle.net client installed? It might have detected your WoW folder and updated it to latest patch. If that's what happened check its settings to make sure it doesn't happen again. And you will have to download the client again.