Go to Tools > Options > Kits to ensure that the 5.15.2 compiler (MinGW) is detected. Click New Project .
This version, 5.15.2, is a cornerstone in Qt's history. As the second patch release in the Qt 5.15 LTS (Long-Term Support) branch, it served as a critical bug-fix and stability update over 5.15.1.
If you are starting a brand-new software project, relying on a static 2020 installer is generally discouraged unless strictly necessary. Consider these paths forward: qt-opensource-windows-x86-5.15.2.exe
Years of software development rely on the Qt 5 API. Upgrading a massive codebase to Qt 6 can introduce breaking changes, making 5.15.2 the safest "final destination" for legacy projects. Included Components and Toolchains
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: This version is historically significant because it marked the end of the traditional offline installer for open-source users. Starting with the 5.15 series, Qt Company decided to stop providing self-contained .exe installers. Open-source users who previously relied on a simple download were now required to use the Qt Online Installer for all setups. This shift was part of a broader strategy to enforce Qt Account logins and move toward a more controlled, modular distribution model, even for open-source software.
Licensed under LGPLv3 or GPLv2/GPLv3, allowing free use for many projects, provided the terms are followed. Go to Tools > Options > Kits to ensure that the 5
Several reasons underpin this policy shift:
The Ultimate Guide to qt-opensource-windows-x86-5.15.2.exe: Installation, Legacy Support, and Best Practices As the second patch release in the Qt 5