4a. Sync your iOS device to iTunes and copy (drag and drop) your FL Studio Mobile projects (.flm) to a folder on your Windows installation and preferably also visible from the FL Studio Browser.
4b. Connect your Android device to your PC via USB. From Windows File Explorer navigate to "...\DEVICE_NAME\Internal storage\FLM User Files" and copy (drag and drop) your FL Studio Mobile projects (.flm) to a folder on your Windows installation, preferably one that is visible from the FL Studio Browser.
5. Drag the .flm project from the FL Studio Browser (or Windows folder) and drop on the FL Studio desktop and the project will be imported. See a video here on how to add new folders to the Browser
The online manual explains the process here
. However here are some notes for you:
1. .zip files exported from FL Studio Mobile will also contain any custom instruments and audio files. Image-Line factory instruments are not included in the .zip and need to be downloaded through the Download & Library manager.
2. To open FL Studio Mobile .zip projects directly in FL Studio for Windows, prior to 11.0.5, you will need to extract the .zip contents to a browser visible location before the project will load. After 11.0.5 you can load the .zip file as is.