Whenever you edit a source file in an app (.prg, .php, .py, .js etc) a backup version wil be kept in the versions workspace (as long as you keep your prg files contained within the app -- this is needed for sandboxing in Lianja Cloud which you will realize soon).
If an App is causing an issue or won't load properly, prior to opening it you can go to the "Versions" workspace and recover any app file (.lianja extension) or any source files (e.g. .prg, .php, .py, .js etc).
Just expand the file tree and you will see a chronological list of files that have been modified since the beginning of time. You double click on a file and it will be displayed readonly in the code viewer.
You can click the "restore" button in the top right hand corner to restore a version.
At any time you can come back to the versions workspace and roll back or roll forward to any point in time to see how your app looks when you do changes to either its behavior of its appearance.
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