On Qt Modules and Tools for Designers and Developers if I choose LGPL then under Development Tools I see QtCreator is disabled.
LGPL v3: With LGPLv3 license option you can use the essential libraries and some add-on libraries of Qt. LGPLv3 allows for keeping your application source code closed as long as all the requirements of LGPLv3 are met.
Should I conclude I'm allowed to use QtCreator while working for a company, if I'm using LGPL?
Keeping the application source code closed is mandatory in the project I'm working.
I'm an employee of the company. AFAIK company wants to sell the resulting software product, keeping application source code closed. I'm simply linking to the Qt libraries, not modifying them and recompiling.