O serviço de suporte de mesclagem me respondeu:
To display multiple comparisons in a single instance of Merge, you need only call the compare.exe command-line tool multiple times, for example:
compare.exe folderA folderB compare.exe folder1 folder2
The above would result in a single instance of Merge displaying a folder comparison for folderA and folderB in one tab, and folder1 and folder2 is a second tab.
I hope this helps to clarify things, if not, please do not hesitate to contact us again.