[Gambas-user] Form1 too old

[mm at ...1313...]

Hi,

I am trying to open a projekt written with Gambas 1 with the current Gambas 
1.9 version. While trying to start the projekt I get an error message:

Cannot load class "Form1": Version too old. Please recompile.

What should I do now? Do I need to recompile the class?

Best Regards
Marcus