I found this link on the Roland UK site, and it does work and lets you download a working copy of the SMF Update App for updating your VS...
https://www.roland.com/uk/support/by_pro...7-d082f0d11af8/
Hope that helps for anyone looking for this tool, as the links to the App in the various VS model specific areas seem to be all or mostly dead.
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880EX, 3x 2480s, 2400CD, 1680, MV8000, MV8800, XV5080, S-550, MC909, Yamaha SY77, Korg M3R,
