Distributed System Manager SysMan ACL.acl

I've managed to lock myself out of the Distributed System Manager.
The help file http://zone.ni.com/reference/en-XX/help/372572A-01/sysman/ni_acl_db/ says to reset security settings remove the SysMan ACL.acl file from the default LabVIEW Data directory. I cant find it
I've completed a search on my hard drive and found no file with an .acl extension
I was logging in and out trying to get the Shared Variable Engine operating correctly and for some reason I decided it would be a good idea to add a new host. A message along the lines of "Changing this setting will no longer allow (Nobody) to log in" It was a Friday afternoon and I presumed that as it was trying to log in with the User (Nobody), this was why my Shared Variable Engine would not connect to my OPC Server
Now the host name I changed it to does not work. It says the user is invalid.
Any ideas how to reset the host settings so I can at least get in?
Alan

Hi Tony
Thanks for your help
See attached I went to Actions>ConfigureSecurity>then selected add New User/Host
Then checked configure new host and typed in the username of the PC.
Not the cleverest thing Ive done recently
Alan
Attachments:
Doc6.doc ‏44 KB

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Attachments:
Get Tag List.vi ‏38 KB

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champlir
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$acl = Get-Acl HKLM:\System\CurrentControlSet\Control\ComputerName
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