New MacBook Pro and Catalina

I moved from a MacBook Pro Mid 2010 running Sierra, to a MacBook Pro 2019 running Catalina. I transferred my license and when I open a previous project, I have a Build button but not a Run button. The application it builds will not run on Catalina. I tried re-installing Xojo, but I have no change.

Any ideas?

Catalina is 64 bit only, you may need to change your project from 32 bit to 64 bit.

You’re correct. I just found that setting. Run button is now enabled and application runs! Thanks for the suggestion.