Receiving COM class not registered error when trying to run my application

Used by:
Win 7x64;
Visual Studio 2019;
MindManager 2019 - MM 19.1.198 (32-x.) 10.01.2019;

Problem:
 My code is throwing the COM class not registered error on the line:
mm.Topic topic = new mm.Topic ();. I get an error.   Error:

Failed to get COM class factory  for component with CLSID {169B91A2-8B3F-4C13-8FD6-81D4C2F76F3D}  due to the following error: 80040154 The class is not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).

The code:

using mm = Mindjet.MindManager.Interop;

mm.Application app;
mm.Document docActiv;
public Form1()
{
    InitializeComponent();

    app = new mm.Application();
}

public void SetXMLProperty(string xmlContent)
{
    docActiv = app.ActiveDocument;

    mm.Topic topic = new mm.Topic();

    topic.Xml = xmlContent;

    docActiv.FloatingTopics.Insert(topic);
}

Question.
What library do I need to register for the Topic class?

Update-1

 Based on the comment pstrjds - quote:

 > I found this potential workaround` Using a 32bit COM object in a 64bit environment https://techtalk.gfi.com/32bit-object-64bit-environment/

 I perform the actions according to the instructions:
 1. I defined the GUID of the COM object.
See Picture-1.
 2. I am searching for an object:
 HKey_Classes_Root\Wow6432Node\CLSID\[GUID]
 3. The result.
 I have no object {1E1D4AF9-6640-49C1-A33B-8CE8B47C9785} in the folder HKey_Classes_Root\Wow6432Node\CLSID\[GUID] no.  
 The object {1E1D4AF9-6640-49C1-A33B-8CE8B47C9785} is located in the folders below. (if required, I can attach pictures of the contents of these folders)

 
HKEY_CLASSES_ROOT
HKEY_CLASSES_ROOT\TypeLib{1E1D4AF9-6640-49C1-A33B-8CE8B47C9785}
HKEY_CLASSES_ROOT\Wow6432Node\TypeLib{1E1D4AF9-6640-49C1-A33B-8CE8B47C9785}

HKEY_LOCAL_MACHINE
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib{1E1D4AF9-6640-49C1-A33B-8CE8B47C9785}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\TypeLib{1E1D4AF9-6640-49C1-A33B-8CE8B47C9785}
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\TypeLib{1E1D4AF9-6640-49C1-A33B-8CE8B47C9785}
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\Wow6432Node\TypeLib{1E1D4AF9-6640-49C1-A33B-8CE8B47C9785}
 
 Question.Update-1
 1. In which folder do I need to follow the instructions?

Picture-1

Update 2.

I am trying to change the solution platform.

Picture-1

Picture-2

For x86
 After - 2 sec. mistake.
 Line 36. mm.Topic topic = new mm.Topic ();
 Failed to get COM class factory for component with CLSID {169B91A2-8B3F-4C13-8FD6-81D4C2F76F3D}
 due to the following error: 80040154 The class is not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG)).
   
 For x64
 After - 25 sec. mistake.
 Line 32. app = new mm.Application ();
 Failed to get COM class factory for component with CLSID {CE786F70-B064-4766-B24D-E6D942936D50} ​​due to the following error: 80080005 Error while executing server application (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE)).
 
 The note.
 For X86 requires a component with CLSID {169B91A2-8B3F-4C13-8FD6-81D4C2F76F3D};
 For x64 equires a component with CLSID {CE786F70-B064-4766-B24D-E6D942936D50}.