It opens fine for me in a current nightly. In general projects made by a pre-5.0 nightly won’t open in 4.0 though, so I think you’ll be stuck using a nightly for it.
Sorry, I’m confused. Nightlies are built every night, hence the name. Therefore the last nightly… was last night.
It is not recommended to use nightly builds, unless you are an advanced user and can cope with bugs, crashes, file corruptions.
I think what you want to do is get a project that will load in 4.0.5, is that right?