Problem with a project

Hello good night I have a problem with a project.
It had saved in basic and now it is in javascript.
How can I go to basic?
sorry for the language

Go to the Project Explorer window in the IDE.

Highlight the first line, Project Properties and Global Code

In the Properties window, go to language and you can change it there.

AppStudio can translate BASIC to JavaScript. It cannot translate JavaScript to BASIC.