If you ever need to use the MSI to install the client for a test installation of eNICQ 6 you will need to edit the enicq6.exe.config file (or it may just say enicq6.exe if you are not displaying common file extensions) so it's pointing at the testconnnection.enicq file since the MSI is intended for a production installation of eNICQ 6.
The configuration file will open in Notepad or other text reader if you open it. Just look for the following line:
<add key="ConnectionFileName" value="VON\connection.enicq" />
Then you would edit it so it instead says the following:
<add key="ConnectionFileName" value="VON\testconnection.enicq" />
THERE MAY BE MORE TO IT THAN THIS, PLEASE SEE BELOW...
You could also just download THIS FILE and save it to C:\Program Files (x86)\Vermont Oxford Network\eNICQ 6 replacing the one that is in there.
TK: I swapped out the config file attached to this kb with one I pulled from an actual test installation. note it also has values for the testcenters and testlicenses tags. I'm assuming these are needed.