Android Question Is B4A backward compatible with older versions?

[Beja]

Asking this question because an old version stopped working, and a friend advised me to update B4A

 

[aeric]

Asking this question because an old version stopped working, and a friend advised me to update B4A

Maybe you need to specify which old version.
If there is an error compiling an old project, check the log to see what is the issue.
Maybe there are changes in some libraries or just warnings to deprecated methods.
Finally, as always, use the latest version. It's free to update. Why stay on old version?