Here is an extract from a reply posted by JABBADEUS on 30 August 2003 at 12:31. I believe this still applies.
In order to get Wildfire to read in the config.pro file each time you launch, place the config file either in:
(1) the text file located in the folder where Wildfire is installed;
(2) in your default working directory, which you can change from the Properties tab, Start In: option when you right click the WF icon; or
(3) the start directory that's listed whenever you open a command shell.
There are two distinctly different methods being listed here and I think people are getting confused.
If you create a new part or assembly WITHOUT a template then the config.pro options determine the units. Like all config options, if multiple files are loaded, the last settings loaded will apply.
If you create a new part or assembly WITH A TEMPLATE then your new part is an exact copy of the template and you will get whatever is in the template.
By default, we work in metric so the loadpoint\text\config.pro file has settings for mm. However, some projects have to be in inches so the working directory for them has a config.pro file with inch settings. The user has to remember to set the working directory and load the config.pro before starting to work. Here are the options I change: