@Rene_Poschl is right. There is no way to convert WRL to STEP so that won’t be a rescue of a project but it would be a completely new project from zero.
Hi @Walter_Lain, it was me that request you to change the material’s parameters! 
(If I remember correctly previously the color information was in the Emissive and the correct place should be on Diffuse parameter)
Since I use mostly 3D Viewer to check the mechanics and don’t need CAD, I still use your models, trusting that they are with correct dimensions!
Thanks!
If you are not on CAD design and maybe would like something more “programatically” with parametric design (FreeCad, Python, CadQuery.. ), you can have a check this information:
That way you can create everything without using an UI or caring about STEP (it will be the product of the work, and not the source information).
@maui could help you on this