what you'll need: No firmware update mechanism published for the standard Vari-White (non-VWC) range on desisti.it. These are simpler bi-color fixtures with DMX control (3 channels). Factory service only for any firmware work.
GotchaThe 'Vari-White range' (F4.7VW, F6VW, F7VW, F10VW, S1VW, S2VW, S4VW, S8VW, Piccoletto VW) is distinct from the VW+Color (VWC) range. Only the VWC range has published firmware updates.
GotchaIf fixtures being tracked are actually VW+C models, they fall under the VWColor range entry above (firmware 4.1).
GotchaThe F6VW manual is at: http://www.desisti.it/wp-content/uploads/2018/12/NEW_CE-INSTRUCTION-MANUAL-SUPER-LED-FRESNEL-F6-Vari-White.pdf