When creating a new file in ArchiCAD using File > New you have a couple of different options.
Use a Template > and select your company template. This option means a new clean file will be created with your company standards.
The other option Use Latest Project Settings > This option creates a new file with the project settings that your last project was using. This is not the recommended option as it means any faults or potential faults in your current file will be carried through and compounded in subsequent files.
If you don’t have a Company Template or would like some advice on your existing one feel free to contact us.