4
u can just overwrite the existing, but i would uninstall the old 1st, and then copy the wfsection to the modules folder, overwriting the old 1..
then goto modules and install again.. as the database tables are slightly different..
on a side note tho, the user upload function doesn't work in the current version, so disable user uploads for now in the admin panel of the module.. u can upload via admin as it stands.
in the next release of wfdownloads, the bug is fixed along with many others and they have changed the directory structure so that it's not mydownloads anymore it will be my_downloads or wf_downloads.. but we'll have to wait for the new version.. shouldn't be too long now by the looks of things..