Problem with plot on V4.4-3

FreeFEM installation
1

I had installed FreeFem++ V3 on Fedora before and it worked well. When I made the plot, a new window opened showing the figure.
Now I had updated and installed V4.4-3 and there is a problem. When I make the plot, no new window appeares any more to show the firgure. I can only use the plot(ps=“file”) to save the figures and view them.
What can I do to make the plot reopening a new window to show the figure again?
Thank you very much!

2

Which FreeFEM do you use? Binary or compiled package?
In compiled case, you can read this post Compiles fine but no graphics in Freefem++ executable (V4)

Axel