I have noticed in my last flights that maybe i am having issues with the weather updates.

I usually notice that to my destination airport as the weather seems "empty" but not clear skies.....

I have checked all the settings regarding  update interval and update on approach e.t.c and they are ok. I even reset them.

If i unload ASP4 and load it again the weather shows up...

Any ideas?

Just going through the unofficial forum here at AVSIM, have you found a solution to your issue?  It could be any number of things like internet connection, simconnect or weather dialog not updating due to your settings.  Can you check that live weather is active, if that does not work then please perform an uninstall/reinstall of ASP4.

If you continue to have issues don't hesitate to submit a ticket at http://support.hifitechinc.com/ and provide all logs which are found in C:\Users\User\AppData\Roaming\Hifi\AS_P3Dv4

Thanks!