Cannot find Sunvox project when running Sunvox in AUv3 host

[GovernorSilver]

On IOS it seems like Sunvox, when used standalone, stores project files in a different location than when it is used as an AUv3 plugin.

When I save a project in AUv3 mode, the project does not appear in SunVox when I open SunVox standalone. The reverse is also true - when I save a project in SunVox standalone, I cannot open the project in SunVox when running it as AUv3.

From talking to other users it seems this is a known problem.

[NightRadio]

On IOS it seems like Sunvox, when used standalone, stores project files in a different location than when it is used as an AUv3 plugin.

This is not a bug of SunVox. It's a "feature" of iOS :)
In the AU plugin, please use Export/Import -> System export/import:
system export to transfer file from AU to standalone;
system import to transfer file from standalone to AU.