CacheHost

Renamed a server - but forgot to rename the AppFabric / Dist. cache 

Now almost everything related gives me errors

Use-cachecluster

Use-CacheCluster : ErrorCode<ERRCAdmin040>:SubStatus<ES0001>:Failed to connect to hosts in the cluste

Stop-CacheCluster
Stop-CacheCluster : ErrorCode<ERRCAdmin008>:SubStatus<ES0001>:No hosts running in cluster.

Get-Cachehost gives me this;

HostName : CachePort     Service Name            Service Status Version Info
--------------------     ------------            -------------- ------------
OLDSERVERNAME:22233 AppFabricCachingService UNKNOWN        0 [0,0][0,0]

When trying to remove it: 

Unregister-CacheHost: ErrorCode<ServiceNotConfigured>:SubStatus<ES0001>:Service is not configured on this host. Run Add-CacheHost to configure.

Exported the config - and adjusted it to new server name - then trying to import the config  

Import-CacheClusterConfig C:\temp\af.txt
Import-CacheClusterConfig : Object reference not set to an instance of an object.

So it's to start over or does someone have the magic bullet?