VERIFIED SOLUTION i

How to understand differences in export formats saving a map or layout window as an image in MapInfo Pro 64-bit

Product affected: MapInfo Pro™ 
Product Feature: Printing/Output/Layout
 
The the list of available export formats using the "save window as" feature from a map or layout window are not the same. 

With a Map Window in front the feature offers the following export formats:

User-added image

With a Layout Designer Window in front the list seems to be truncated:

User-added image

The Layout Designer is a Windows Presentation Foundation (WPF) based window. The Map and the original Layout Windows are Win32 based windows. The exporting is done differently for WPF windows vs Win32 windows.

Due to technical limitations, we cannot support all of the same file formats. Unfortunately metafiles (EMF/EMF+/WMF) are not supported for WPF types of windows. 
WPF windows support exporting to these formats: BMP, JPG, JP2, PNG, TIF (various types), GIF and PSD.
UPDATED:  April 9, 2019