this is created in 2022
so why aren't this map for smbx 2.0?
latest version > older version
smbx 1.4.5 is a misnomer for said version. it's an alternate version of the engine made from scratch which has no relation (and is incompatible for the most part) with smbx2. a more commonly used name for it is smbx-38a (named after the creator) in order to avoid exactly this misconception.