As per the subject.
I have already registered on https://professional.victronenergy.com, reviewed the Changelog and read the associated documents, and I understand that I need a 26084xx file; on https://professional.victronenergy.com/downloads/firmware, I can see that:
a) There is *no* 2608430 file, so I understand that, after I upgrade, there is no going back to the version that came with the equipment (unless I can download or back it up from the equipment itself?)
b) The only versions I can see are 2608433, 2608459 (these, located in separate subdirectories) and (in the main directory) 2608485; the latest version (486, as mentioned on the Changelog) is not available for my equipment (ie, there is no 2608486.vff file available), despite being available for very similar ones (eg 2609, which according to  would be a MultiPlus 12/3000/120-16). Any reason for it not being available for my equipment?
c) Between 2608433, 2608459 and 2608485, which one should I install?
Thanks in advance!