How do I UNLOCK modded SGC files from Richard Burns Rally?

[squidiskool]

You can open the Richards Burns Rally *.sgc files using the following programs:

- 3D Object Converter v7.044 (Windows)
- i3DConverter v3.903 (macOS)
- i3DConverter v1.903 (Linux)

How to get the 3D Object Converter v7.044:
Download the 3D Object Converter from http://3doc.i3dconverter.com and install it or download and use the portable version.
After it just use the Help/Check for updates... function to get the v7.044.

How to get the i3DConverter macOS v3.903:
Download the i3DConverter from http://www.i3dconverter.com and install it.
After it just use the Help/Check for updates... function to get the v3.903.

How to get the i3DConverter Linux v1.903:
Download the i3DConverter from http://www.i3dconverter.com and install it.
After it just use the Help/Check for updates... function to get the v1.903.

that's paid software. is there a way to do it for free?