Can I send .asset files to my external 3d app?

I have a number of 3d models stored in .asset files and was wondering if it’s possible to send these to my 3d modelling app (Cinema 4D) for editing and re-importing to Unity? I need to reposition the pivot point to a more appropriate location than the centre of the object.

Any help is appreciated.

I don’t know of any .asset importer for C4D.