2606 MultiPlus Compact 12/1600/70-16 v152 (2606152) to which safest version firmware upgrade?

Hello!

Question quickly (context below on this message): what is the maximum version (keep on the safe side) to upgrade to using VEFlash as my version is so old I have no other option?
List of options on the https://professional.victronenergy.com/:

Context:

I have a quite old MultiPlus Compact 12/1600/70-16 on my boat (boat is 20yo, don’t know if this Victron was commissioned with the boat or installed somewhere after), anyway it is currently running on firmware version 2606152. With current version I can connect with VEConfigure3 + MK3/USBA (this setup only works on Windows machines) but I can’t connect using VictronConnect Windows + MK3/USBA:

And, apparently, I have limited access using VictronConnect Mac + VE.Bus BT Smart Dongle:


(no WATTs / firmware upgrade options and eventually other options which I don’t know)

Same for Victron Connect iOS + VE.Bus BT Smart Dongle:

On these 2 laste setups it suggests to upgrade to 415 but, conssulting the firmware list they have only 200s, 433, 459 and 500s:

Version 433 should work, but why not upgrade to the latest? (Not all version numbers are issued for each model)