EDIT TO NOTE: I am not using a zip version, but the latest install .exe
I'm having exactly the same issue trying to install for the first time today, the only difference being "direct2d" and "offscreen" don't show as plugin options
Here is the debug view output
[20620] QFactoryLoader::QFactoryLoader() checking directory path "C:/cots/win64_vs2013/plugins/platforms" ...
[20620] QFactoryLoader::QFactoryLoader() looking at "C:/cots/win64_vs2013/plugins/platforms/qwindows.dll"
[20620] Found metadata in lib C:/cots/win64_vs2013/plugins/platforms/qwindows.dll, metadata=
[20620] {
[20620] "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
[20620] "MetaData": {
[20620] "Keys": [
[20620] "windows"
[20620] ]
[20620] },
[20620] "className": "QWindowsIntegrationPlugin",
[20620] "debug": false,
[20620] "version": 329216
[20620] }
[20620]
[20620]
[20620] Got keys from plugin meta data ("windows")
[20620] QFactoryLoader::QFactoryLoader() looking at "C:/cots/win64_vs2013/plugins/platforms/qwindowsd.dll"
[20620] Found metadata in lib C:/cots/win64_vs2013/plugins/platforms/qwindowsd.dll, metadata=
[20620] {
[20620] "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
[20620] "MetaData": {
[20620] "Keys": [
[20620] "windows"
[20620] ]
[20620] },
[20620] "className": "QWindowsIntegrationPlugin",
[20620] "debug": true,
[20620] "version": 329216
[20620] }
[20620]
[20620]
[20620] "The plugin 'C:/cots/win64_vs2013/plugins/platforms/qwindowsd.dll' uses incompatible Qt library. (Cannot mix debug and release libraries.)"
[20620] not a plugin
[20620] QFactoryLoader::QFactoryLoader() checking directory path "C:/Program Files/RStudio/bin/plugins/platforms" ...
[20620] QFactoryLoader::QFactoryLoader() looking at "C:/Program Files/RStudio/bin/plugins/platforms/qminimal.dll"
[20620] Found metadata in lib C:/Program Files/RStudio/bin/plugins/platforms/qminimal.dll, metadata=
[20620] {
[20620] "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
[20620] "MetaData": {
[20620] "Keys": [
[20620] "minimal"
[20620] ]
[20620] },
[20620] "archreq": 0,
[20620] "className": "QMinimalIntegrationPlugin",
[20620] "debug": false,
[20620] "version": 330752
[20620] }
[20620]
[20620]
[20620] Got keys from plugin meta data ("minimal")
[20620] QFactoryLoader::QFactoryLoader() looking at "C:/Program Files/RStudio/bin/plugins/platforms/qwindows.dll"
[20620] Found metadata in lib C:/Program Files/RStudio/bin/plugins/platforms/qwindows.dll, metadata=
[20620] {
[20620] "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
[20620] "MetaData": {
[20620] "Keys": [
[20620] "windows"
[20620] ]
[20620] },
[20620] "archreq": 0,
[20620] "className": "QWindowsIntegrationPlugin",
[20620] "debug": false,
[20620] "version": 330752
[20620] }
[20620]
[20620]
[20620] Got keys from plugin meta data ("windows")
[20620] QFactoryLoader::QFactoryLoader() checking directory path "C:/Program Files/RStudio/bin/platforms" ...
[20620] QFactoryLoader::QFactoryLoader() looking at "C:/Program Files/RStudio/bin/platforms/qwindows.dll"
[20620] Found metadata in lib C:/Program Files/RStudio/bin/platforms/qwindows.dll, metadata=
[20620] {
[20620] "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
[20620] "MetaData": {
[20620] "Keys": [
[20620] "windows"
[20620] ]
[20620] },
[20620] "archreq": 0,
[20620] "className": "QWindowsIntegrationPlugin",
[20620] "debug": false,
[20620] "version": 330752
[20620] }
[20620]
[20620]
[20620] Got keys from plugin meta data ("windows")
[20620] Cannot load library C:\cots\win64_vs2013\plugins\platforms\qwindows.dll: The specified procedure could not be found.
[20620] QLibraryPrivate::loadPlugin failed on "C:/cots/win64_vs2013/plugins/platforms/qwindows.dll" : "Cannot load library C:\\cots\\win64_vs2013\\plugins\\platforms\\qwindows.dll: The specified procedure could not be found."
[20620] qt.qpa.plugin: Could not load the Qt platform plugin "windows" in "" even though it was found.
[20620] This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
[20620]
[20620] Available platform plugins are: windows, minimal.
[20620]