There are three situations where you will need to use the XeLaTeX package based on TeX Live 2020.  (XLingPaper normally uses one based on TeX Live 2010.)  These three cases are :

  1. You are using the Charis SIL font version 5.000 and you need to use Graphite capabilities with it.
  2. You are running on a Mac, using El Capitan or higher and have just upgraded your version of XLingPaper to 3.7.5 (or higher).
  3. You are using the Awami Nastaliq font and you need to use Graphite capabilities with it.

If any of these are what you need, then first download and install the XeLaTeX from TeX Live 2020 on your machine per the table below.

Operating SystemInstaller to downloadSizeHow to install
WindowsXeLaTeXFromTeXLive2020ForXLingPaper.exe42MBRun the installer. It will do all that is needed.
Mac OS XMacXeLaTeX2020Installer.dmg52MBRun the installer. It will do all that is needed.
LinuxXeLaTeX2020Installer.tar.gz50MB
  1. Decompress and extract the installer in some directory.
  2. In a Terminal, do
    sudo ./installXeLaTeX2020

Second, start up the XMLmind XML Editor and open one of your XLingPaper documents.  Then do this:

  1. Use Tools menu item / Execute Command.
  2. In the Command box, type
    UseXeLaTeXVersion2020
  3. Click on OK.

Note that you only need to do the UseXeLaTeXVersion2020 command once.

Finally, there are some differences between the older way of producing PDF and this one.  See the known differences page.