SDL Trados 2019 has been working great since July. All of a sudden it won't launch showing the above message. 

Here's what I tried already:

1) Repair (using MS Add/Remove programs). 

2) Removing Plugins in C:\Users\[User]\AppData\Roaming\SDL\SDL Trados Studio\15\Plugins\Packages

and in  C:\Users\[User]\AppData\Roaming\SDL\SDL Trados Studio\15\Plugins\Unpacked

3) Uninstalling/Reinstalling from Windows Add/Remove utility

4) The same as the above, but from SDL FreshStart App. 

5) Running the [SDL Studio] packages from the packagecache folder.

6) Repeating the above.. !!

 I don't have support, but I am hoping someone here would be able to help me (urgently). 

Here's the stack:

<ErrorMessage>Exception has been thrown by the target of an invocation.</ErrorMessage>
<Exception>
<Type>System.Reflection.TargetInvocationException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
<Source>mscorlib</Source>
<HResult>-2146232828</HResult>
<StackTrace><![CDATA[

at System.RuntimeMethodHandle.SerializationInvoke(IRuntimeMethodInfo method, Object target, SerializationInfo info, StreamingContext& context)

at System.Runtime.Serialization.ObjectManager.CompleteISerializableObject(Object obj, SerializationInfo info, StreamingContext context)

at System.Runtime.Serialization.ObjectManager.FixupSpecialObject(ObjectHolder holder)
at System.Runtime.Serialization.ObjectManager.DoFixups()
at System.Runtime.Serialization.Formatters.Binary.ObjectReader.Deserialize(HeaderHandler handler, __BinaryParser serParser, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)

at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize(Stream serializationStream, HeaderHandler handler, Boolean fCheck, Boolean isCrossAppDomain, IMethodCallMessage methodCallMessage)

at System.Resources.ResourceReader.DeserializeObject(Int32 typeIndex)
at System.Resources.ResourceReader._LoadObjectV2(Int32 pos, ResourceTypeCode& typeCode)
at System.Resources.ResourceReader.LoadObjectV2(Int32 pos, ResourceTypeCode& typeCode)
at System.Resources.ResourceReader.LoadObject(Int32 pos, ResourceTypeCode& typeCode)
at System.Resources.RuntimeResourceSet.GetObject(String key, Boolean ignoreCase, Boolean isString)
at System.Resources.RuntimeResourceSet.GetObject(String key, Boolean ignoreCase)
at System.Resources.ResourceManager.GetObject(String name, CultureInfo culture, Boolean wrapUnmanagedMemStream)

at System.Resources.ResourceManager.GetObject(String name, CultureInfo culture)
at Sdl.TranslationStudio.Common.ImageResources.get_current_user()
at Sdl.TranslationStudio.Common.SetupWizard.Wizard.AddWizardPages()
at Sdl.Desktop.Platform.Wizard.AbstractWizard`1.InitializeWizardPages()
at Sdl.Desktop.Platform.Wizard.AbstractWizard`1.get_HasAvailablePages()
at Sdl.TranslationStudio.Common.SetupWizard.SetupWizardLauncher.Execute()
at Sdl.Desktop.Platform.Implementation.Studio.ExecuteStartupExtensions()
at Sdl.Desktop.Platform.Implementation.Studio.Run()
at Sdl.TranslationStudio.Application.ApplicationStartup.RunApplication()
at Sdl.TranslationStudio.Application.Launcher.RunApplication()]]></StackTrace>
<InnerException>
<Type>System.ComponentModel.Win32Exception, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
<NativeErrorCode>0</NativeErrorCode>
<ErrorCode>-2147467259</ErrorCode>
<HelpLink />

<Source>System.Drawing</Source>
<HResult>-2147467259</HResult>
<StackTrace><![CDATA[ at System.Drawing.Icon.Initialize(Int32 width, Int32 height)
at System.Drawing.Icon..ctor(SerializationInfo info, StreamingContext context)]]></StackTrace>
</InnerException>
</Exception>
<Environment>
<ProductName>SDL Trados Studio</ProductName>
<ProductVersion>15.0.0.0</ProductVersion>
<EntryAssemblyFileVersion>15.0.0.29074</EntryAssemblyFileVersion>
<OperatingSystem>Microsoft Windows 8.1 Pro</OperatingSystem>
<ServicePack>NULL</ServicePack>
<OperatingSystemLanguage>1033</OperatingSystemLanguage>
<CodePage>1256</CodePage>
<DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
<ConnectedToNetwork>True</ConnectedToNetwork>
<PhysicalMemory>8293548 MB</PhysicalMemory>
</Environment>
</SDLErrorDetails>