You should be able to do this via
Item | Show Explorer Menu.
https://kinook.com/UltraRecall/Manua...w+context+menu
From there, if that app registers a shell context menu, it should show up. Otherwise, you might be able to use Open With or Send To in order to open with the desired app. If neither of those work, you can create your own shell context menu.
https://www.groovypost.com/howto/mic...-context-menu/
https://www.howtogeek.com/howto/wind...ht-click-menu/