If you have decided to program with Gambas in the future, you should choose a stable version 3 from the package sources of the Linux distribution or install the current stable Gambas version 3 from the project sources.
Currently, most programmers work with the stable Gambas version 3 and only a few use the developer version via GIT. Late changes from stable version 2 to stable version 3 should follow the following instructions:
If you change from Gambas2 to Gambas3 or from Gambas3 - version smaller than version 3.4.0 - to a higher version you have to note that the installation directories have changed! This requires a clean and complete de-installation of the current Gambas version and a new installation of the development environment of Gambas.
The de-installation and (new) installation are described in separate chapters in the online book.