This thread is resolved. Here is a description of the problem and solution.
Problem: when editing a product page in the secondary language, you get a 2 column page instead of the classic WordPress edit page
Solution: the 2 page column is our Translation Editor, which is the default solution when you install WPML and what we suggest to use. To use manual translation, change the settings in WPML -> Settings -> How to translate posts and pages -> Translate your content manually
Relevant Documentation:https://wpml.org/documentation/translating-your-contents/translation-tools-available-with-wpml/ https://wpml.org/documentation/getting-started-guide/#how-to-translate-different-kinds-of-content
This is the technical support forum for WPML - the multilingual WordPress plugin.