Your costguard.ini file contains all the information CostGuard needs to run including where your data files are located, system configurations and logins.
The message CostGuardsystem\ does not exist means the ini file is nearly empty and missing important information.
Generally this means the costguard.ini file has been edited.
You will need to reinstall CostGuard, which will also rebuild the .ini file.
You won’t lose any data, but you should always make a backup just in case.
To reinstall use the Trial Version