In OpenPlant Isometrics Manager CONNECT Edition, when launched from desktop, it reads the default configuration from out of the box. Refer the attached image below
By adding the argument it can be pointed to shared/network drive configuration. The below wiki article explain how to do so.
If above problem still persists, then please create a Service Request and contact the Bentley Product Advantage group. Please include a list of all relevant details to get in depth analysis for a solution or workaround