Error Message About Firefox after Updated to 5.29

[Cyrix]

I am getting this error message at the start of running a project after updating PM to 5.29
The project was originally developed in 5.09.

Why and how to solve it?
Thanks.

 

[VladZen]

This is not error message. This warning.
ProjectMaker by default uses more up-to-date browser - FreFox52. But your project has quite old FireFox 45.
Select newer browser in project settings.

 

[Cyrix]

When I run the old project in new ZP, this box doesn't show.
Will the new ZP automatically choose the latest FF or stay with the old FF?

Thanks.

 

[VladZen]

When I run the old project in new ZP, this box doesn't show.
Will the new ZP automatically choose the latest FF or stay with the old FF?

Thanks.

ZennoPoster stays with old FF