I would guess there isn't that possiblity, I mean, Vue 4 is 3 to 4 years old already and if you trace it all the way back to Vue 3 that's maybe 6 years of waiting to upgrade. I've never heard of a 3d software that runs upgrades from a version 2 versions old, besides, it's only $50 (United States anyway) difference which isn't that much if you're jumping from Vue 3 all the way up to Vue 5, the massive boost in features available between the two versions more than makes up for it.