Hi.
No that won’t work as with Version 1.6 and higher the vault format changed from 7 to 8
See here: Vault Format History — Cryptomator 1.7.0 documentation
That means if you want to open a vault with app version 1.5.x, you’ll have to use this old version on all other machines as well.
Please do not consider this as a recommendation to use such an old cryptomator version.