of Dolphin was released, featuring back-end improvements to OpenGL rendering and OpenAL audio, broader controller support, networking enhancements, and performance tweaks for macOS and Linux builds. Months later, versions 4.0.1 and 4.0.2 were released, fixing minor bugs. Drop of legacy technologies, accuracy improvements, and 5.0 release (2013–2016) On 12 October 2013 (4.0-155), Direct3D 9 support was removed from the project, leaving Direct3D 11 and OpenGL as the two remaining video back-ends. The Dolphin Team explained this, stating that the plug-in was "inherently flawed" and that trying to evade its several flaws "wasted time and slowed development." On 19 May 2014, the Dolphin Team announced that 32-bit support for Windows and Linux would be dropped. The Dolphin Team stated that it was becoming increasingly difficult to maintain the 32-bit builds, and that the 32-bit releases simply offered an inferior experience compared to their 64-bit counterparts. Furthermore, the vast majority of their users were already using 64-bit CPUs, and most users of 32-bit builds were 64-bit compatible yet were using 32-bit by mistake. The combination of these factors made 32-bit support unnecessary. 32-bit Android builds suffered from similar issues, but ARMv7 support remained for another year until the AArch64 JIT was ready and devices were available. Throughout 2014, several features were implemented into Dolphin, including disc loading emulation, native support for GameCube controllers, perfect audio emulation, and bug fixes for problems which had been present since the emulator's earliest days. Memory management unit (MMU) improvements allowed many games to boot and work properly for the first time. Improvements towards the emulator also allowed for it to run well on Android using the Nvidia Tegra processor, albeit with minor difficulties. In coordination with the developers of the VBA-M Game Boy Advance emulator, support for linking GameCube and Game Boy Advance games was implemented into Dolphin in March 2015. On 25 May 2015 – the Dolphin Development team announced that they had successfully re-licensed the code base from "GPL-2.0-only" to "GPL-2.0-or-later" in order to improve license compatibility with other Free and open-source projects and be able to share and exchange code with them. In August 2015, the Dolphin developers announced further improvements with audio and throughout December 2015 the Dolphin project fixed audio issues on TR Wii Remotes. Two months later, in February 2016, a Direct3D 12 back-end was mainlined after months of development. On 24 June 2016, version 5.0 of Dolphin was released,