Hello guys:
Because I downgrade spine to v 3.4.02 i can't open the examples. 
thanks guys.
Where can I get .v 3.4.02 examples?
- Editado
You can find some 3.4 examples if you download this release of the runtimes from github.
Release 3.4.02
Look for the "examples" folder.
Done! thanks a lot a really aprecciate the time you spent in your answer 