Hi @Alienoid,
As @djdarkknight96 said you should be able to update it normally unless
1) The current app is added to the system folder by ROM dev.
2) It's just a newer version.
3) It has a different signature (modifying the app not allowed and using it not recommended).
Thanks.
sory but my mobile is not rooted,i have the orignal xperia firmware and rom...so i am sory but i dont understand what you just mentioned above..this is what i do once an updated version is out,normally i uninstall the old one delete the old apk and download the new one and install it...thanks !