Yes, the actual .zip is the revamped version and it also contain all the old stuff in a separate folder called "7_Modern_Office_Previous_Version"
Viewing post in Modern Office - Revamped - RPG Tileset [16x16] comments
OK thanks, was just a little confused by the versioning.
Also itch is telling me that I don't own it on the devlog page here: https://limezu.itch.io/modernoffice/devlog/268689/modern-office-total-revamp but I think this is the same asset, right? - the revamped_v1.0 and itch is just being silly.
From the https://itch.io/my-collections you should be able to re-download everything you have already paid for!