If age2_x1.exe looks different (non-windowed, etc.) compared to age2_x1.0c.exe, then your age2_x1.exe has likely been reverted by Voobly and is no longer v1.3. Since age2_x1.exe will likely get overwritten again the next time you use Voobly, we'll need to try something else.
From the preinstalled v1.3 zip file, extract "age2_x1.exe" outside the game folder, rename it to "age2_x1.3.exe", move it into the "age2_x1" folder and you should be able to use that to watch .mgz recs in windowed mode. If you need the Mfill NormalMouse NOSC Msync, then be sure to right-click on "age2_x1.3.exe", select "Create Shortcut", right-click on the new shortcut, select "Properties", and add the Mfill NormalMouse NOSC Msync into the "target" box. After that, start the game with the new shortcut.
Example for the shortcut target box:
"C:\Program Files (x86)\Microsoft Games\Age of Empires II\age2_x1\age2_x1.3.exe" nostartup Mfill NormalMouse NOSC Msync
If you need further assistance, we can borrow the aofe live support chat here:
http://forgottenempires.net/live-support/
From the preinstalled v1.3 zip file, extract "age2_x1.exe" outside the game folder, rename it to "age2_x1.3.exe", move it into the "age2_x1" folder and you should be able to use that to watch .mgz recs in windowed mode. If you need the Mfill NormalMouse NOSC Msync, then be sure to right-click on "age2_x1.3.exe", select "Create Shortcut", right-click on the new shortcut, select "Properties", and add the Mfill NormalMouse NOSC Msync into the "target" box. After that, start the game with the new shortcut.
Example for the shortcut target box:
"C:\Program Files (x86)\Microsoft Games\Age of Empires II\age2_x1\age2_x1.3.exe" nostartup Mfill NormalMouse NOSC Msync
If you need further assistance, we can borrow the aofe live support chat here:
http://forgottenempires.net/live-support/