If the hacked 3055 FW has the 3045 ID to run on the 3045, it could well work with just a normal firmware update to the original 3045. We don't know the details and thus the rather good question on how to get possibly back, just in case (e.g. if you want to sell the meter).
It may work with the original FW, or it may need a slightly patched one.
Another similar question is, if there is a future SDM3055 FW update, how to apply this to the hacked meter ?