QtDesignStudio/QMLProjectFileFormat
With Qt Design Studio 4.5 the project structure did change.
The default import path is now "./" the root folder of the project, since this better matches with the requirements of the QML compiler and tooling around QML. Before there were usually two import "imports" and "assets_imports". Also relative URLS between modules are now the same in QDS and in the compiled C++ application.
The default project module is now in ./ProjectName instead of imports/ProjectName.
Assets are now imported to "Generated" instaed of "assets_imports". QtQuick3D assets are now in Generated/QtQuick3D and Generated.Effects instead of e.g. assets_imports/QtQuick3DAssets.
Adjusting the project strucuture for legacy projects:
Move the project module from "./import/ProjectName" to "./ProjectName". The same applies to any other module in imports.
Move all modules from "./assets_imports" to "./Generated" unfortly this also requires adjusting the import URI throughout the project.