Qt Creator 4.2.0 RC1 crashes on select a Qt kit for qbs projects

Active Project Settings page has a new look in 4.2.0
Every time I select any Qt kit (click on it) except the one selected by default, Qt Creator crashes.

Update:
It happens only with qbs projects.

Update 2:
It corrupted my settings! After I deleted 4.2.0RC and came back on 4.1.1 from Qt 5.8.0b bundle, first I was not able to compile the qbs project that worked normally before (the app crashed on start up):
Undefined symbols for architecture x86_64:
"std::terminate()", referenced from:
__clang_call_terminate in qrc__qbs_auto_plugin.cpp.o
___clang_call_terminate in main.cpp.o
"___cxa_begin_catch", referenced from:
__clang_call_terminate in qrc__qbs_auto_plugin.cpp.o
___clang_call_terminate in main.cpp.o
QList<QString>::append(QString const&) in main.cpp.o
"___cxa_end_catch", referenced from:
QList<QString>::append(QString const&) in main.cpp.o
"___cxa_rethrow", referenced from:
QList<QString>::append(QString const&) in main.cpp.o
"___gxx_personality_v0", referenced from:
(anonymous namespace)::initializer::~initializer() in qrc___qbs_auto_plugin.cpp.o
Dwarf Exception Unwind Info (_eh_frame) in qrc__qbs_auto_plugin.cpp.o
loadFonts() in main.cpp.o
_main in main.cpp.o
QList<QString>::append(QString const&) in main.cpp.o
Dwarf Exception Unwind Info (__eh_frame) in main.cpp.o
ld: symbol(s) not found for architecture x86_64

Then I tried to delete the build folder and reimport the project but I was not able to do it either ("Unknown or empty profile ‘qrc_Desktop_c2092895’") so I ended up deleting all my Qt Creator settings (~/.config/QtProject) and it helped.