On C Drive, have not change anything there.
Only thing i have done, is make a new folder to install VFXCentral, only to get it outside C:\Program Files (x86) folder, i always do that when installing other software\programs.
Everything related to Windows installation, nothing have been changed.
And as you see in log file, P3D is located on D Drive, D:\Prepar3D v4\
And for info, have tried VFXCentral installed in default location, C:\Program Files (x86) and like now C:\X Program Files\, same result on both, preview's only works.