We continue working on this, but we must solve some problems yet.
If that helps, Forest uses its own Qt runtime.
These are the required files, which currently are copied to the 3DS Max root folder:
Qt5CoreItoo.dll
Qt5Gui_Itoo.dll
Qt5Network_Itoo.dll
Qt5Solutions_MFCMigrationFramework-Itoo.dll
Qt5Widgets_Itoo.dll
Qt5Xml_Itoo.dll
The "Qt5Itoo" folder.