Since the module is simply looking at the lists table for authorized extensions, I would try modifying the table directly (using ssms) by adding a record (row) with the svg extension and see if it works.  Look at the other entries and follow the same format.  if it doesn't work, you can always delete the row that you just added.

I need to do this too. Where Do I find this. I dont see an image types list in the Host/ Lists . Where is it found?