You may experience the following error while trying to install a PDF2XL product (PDF2XL, Merge PDF, Split PDF):
The code execution cannot proceed because mfc140u.dll was not found. Reinstalling the program may fix this problem.

This is a Microsoft-related error that is caused when the DLL is missing from the machine.

The Microsoft installer for this file can be downloaded here: https://aka.ms/vs/16/release/vc_redist.x86.exe

Once you've installed the DLL, your PDF2XL install should proceed without issue.