It needs at least Pd Vanilla 0.50.0 (thanks to the new [pdcontrol] object from 0.50.0, cyclone/buffer~ can now load files relative to its owner patch). There's also a few fixes and improvements, but more importantly, we're removing the capital letters aliases (this was warned in the cyclone 0.3 release). Find more details and binaries at: https://github.com/porres/pd-cyclone/releases/tag/cyclone0.4

Hold on for them being available in deken in a day or so...
(raspberry pi binaries will take a little bit more to appear)

cheers