Edit a software (ASAR), language and images -- 3

Hi, we use a software purchased with an extended license, so we can edit code. It runs both on MAC and Windows, the two executables to install it are a .dmg and .exe Inside the package there is always an [login to view URL] file and html/js/css files Is it possible, from a .dmg and .exe edit some texts and images and then re-build the executable for both OS? We will provide a file with text changes (it is a translation) and images to replace to the original ones. We will not touch its functionalities nor we have to develop something. Only change logo, app icon and translate texts, re-build the installers and that's done