Installer not upgrading .NET Framework? [.NET 4.6.2 or later is needed]

I'm running Windows 7 Enterprise, SP1. In the add/remove programs control panel, the .NET version is listed as "Microsoft .NET Framework 4.5.2", version 4.5.51209.

I tried installing 1PasswordSetup-7.0.555.BETA.exe. It installed, seemingly without complaining about or upgrading my .NET version. And then 1Password.exe repeatedly crashed... which I gather (from the forums, not the release notes) could be happening because it requires .NET Framework 4.6. Do you want more forensics, or should I just go ahead and try installing .NET Framework 4.6?

Application: 1Password.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.Windows.Markup.XamlParseException
Stack:
   at System.Windows.Markup.WpfXamlLoader.Load(System.Xaml.XamlReader, System.Xaml.IXamlObjectWriterFactory, Boolean, System.Object, System.Xaml.XamlObjectWriterSettings, System.Uri)
   at System.Windows.Markup.WpfXamlLoader.LoadDeferredContent(System.Xaml.XamlReader, System.Xaml.IXamlObjectWriterFactory, Boolean, System.Object, System.Xaml.XamlObjectWriterSettings, System.Uri)
   at System.Windows.ResourceDictionary.CreateObject(System.Windows.Baml2006.KeyRecord)
   at System.Windows.ResourceDictionary.OnGettingValue(System.Object, System.Object ByRef, Boolean ByRef)
   at System.Windows.ResourceDictionary.OnGettingValuePrivate(System.Object, System.Object ByRef, Boolean ByRef)
   at System.Windows.ResourceDictionary.GetValueWithoutLock(System.Object, Boolean ByRef)
   at System.Windows.ResourceDictionary.GetValue(System.Object, Boolean ByRef)
   at System.Windows.ResourceDictionary.get_Item(System.Object)
   at AgileBits.OnePassword.App..ctor()
   at AgileBits.OnePassword.Program.RunMainApp(System.String[])
   at AgileBits.OnePassword.Program.Main(System.String[])


Faulting application name: 1Password.exe, version: 7.0.555.0, time stamp: 0x5b08ad4e
Faulting module name: KERNELBASE.dll, version: 6.1.7601.24117, time stamp: 0x5add1e33
Exception code: 0xe0434352
Fault offset: 0x0000c54f
Faulting process id: 0x13a8
Faulting application start time: 0x01d3f5423ff31105
Faulting application path: C:\Users\<redacted>\AppData\Local\1password\app\7\1Password.exe
Faulting module path: C:\Windows\syswow64\KERNELBASE.dll
Report Id: 7e846997-6135-11e8-b482-507b9d392bcd

1Password Version: 7.0.555.BETA
Extension Version: Not Provided
OS Version: Windows 7 Enterprise SP1
Sync Type: Not Provided