Content gets installed to two folders

Install QtC10.0.0 beta1:

preview.qt.tools.qtcreator
qt.tools.qtcreator_gui
qt.tools.qtcreatorcdbext
qt.tools.qtcreatordbg
qt.tools.qtcreator_gui.enterprise.plugins
qt.tools.qtcreator.enterprise.plugins
qt.tools.qtcreatordev

see the installation dir after installer has finished:

Tools/CMake
Tools/Ninja
Tools/Preview
Tools/Qt Creator 10.0.0-beta1
Tools/QtCreator
Tools/sdktool

The Tools/Preview has only few files:

Tools/Preview/Qt Creator 10.0.0-beta1/lib/qtcreator/plugins:

libInsight.so
libLicenseChecker.so
libVxWorks.so
qmldesigner/

Tools/Preview/Qt Creator 10.0.0-beta1/share/qtcreator/qmldesigner/QmlTemplates:

ButtonMergeTemplate.qml
CheckboxMergeTemplate.qml
SwitchMergeTemplate.qml
templates.json

when the Tools/Qt Creator 10.0.0-beta1/ seems to have more content. Creator launches from Tools/Preview/Qt Creator 10.0.0-beta1/