Where is the menu to add API's?
which version of bOS is this running on? API node was added in 4.4.x version, try updating to the latest version, API should be there.
If I create a new project, the API menu appears, but when recovering a Backup file, it disappears again. Do I have to create the project from the beginning? I can not recover an old project and add more features?
Seems there was a problem when updating. You can try and use Import function to add API into your new configuration, or use Import function to import old configuration manually instead of starting from scratch.
Customer support service by UserEcho