flashdevelop: Haxedevelop not working since recently

So it seems a recent window supdate or something broke Haxedevelop altogether. I am unable to start it at all now, just get alot of exceptions when it launches.

Have tried to remove and reinstall everything many times, but no luck. Could be related to : https://github.com/fdorg/flashdevelop/issues/3033

Haxedevelop is my main coding tool, so im getting a bit of panic 😃

The problem is persistant on Win 10 with 5.3.4 and older versions also. Release build (2 year old) worked like normal.

Here is the exceptions log (from today)

08.06.2020 09:17:24

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Windows.Forms.Form.ControlCollection.Add(Control value)
   at StartPage.PluginMain.CreateStartPage()
   at StartPage.PluginMain.ShowStartPage()
   at StartPage.PluginMain.HandleEvent(Object sender, NotifyEvent e, HandlingPriority priority)
   at PluginCore.Managers.EventManager.DispatchEvent(Object sender, NotifyEvent e)

08.06.2020 09:17:25

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Windows.Forms.Form.ControlCollection.Add(Control value)
   at FlashDevelop.MainForm.CreateEditableDocument(String file, String text, Int32 codepage)

08.06.2020 09:17:26

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Windows.Forms.Form.ControlCollection.Add(Control value)
   at StartPage.PluginMain.CreateStartPage()
   at StartPage.PluginMain.ShowStartPage()
   at StartPage.PluginMain.HandleEvent(Object sender, NotifyEvent e, HandlingPriority priority)
   at PluginCore.Managers.EventManager.DispatchEvent(Object sender, NotifyEvent e)

08.06.2020 09:17:26

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Windows.Forms.Form.ControlCollection.Add(Control value)
   at FlashDevelop.MainForm.CreateEditableDocument(String file, String text, Int32 codepage)

08.06.2020 09:17:38

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Windows.Forms.Form.ControlCollection.Add(Control value)
   at StartPage.PluginMain.CreateStartPage()
   at StartPage.PluginMain.ShowStartPage()
   at StartPage.PluginMain.HandleEvent(Object sender, NotifyEvent e, HandlingPriority priority)
   at PluginCore.Managers.EventManager.DispatchEvent(Object sender, NotifyEvent e)

08.06.2020 09:17:39

System.NullReferenceException: Object reference not set to an instance of an object.
   at System.Windows.Forms.Form.ControlCollection.Add(Control value)
   at FlashDevelop.MainForm.CreateEditableDocument(String file, String text, Int32 codepage)