Hello, if one uses sdktool to programmatically configure parts of QT Creator[1], the resulting configuration is saved in /usr/share/qtcreator/QtProject However, dpkg --purge qtcreator, which should also remove its configuration, does not remove that directory, which is then left as cruft in the filesystem, and found by a following reinstall of Qt Creator. I suppose adding a `rm -rf /usr/share/qtcreator/QtProject` of that directory in postinst is all that's required to fix this Thank you, Enrico [1] see for example https://embeddeduse.com/2020/11/21/cross-compiling-qt-embedded-applications-with-qtcreator-and-cmake/ and https://code.qt.io/cgit/yocto/meta-boot2qt.git/tree/meta-boot2qt/files/configure-qtcreator.sh