hi,,, how i can update AppTapp Installer v2.63 to v3.o?

i do have in my uninstall list Installer v3.ob8 but its 0 bytes and wont let me install !!! i try to reinstall but still the same!!
the Installer v2.63 works fine with me but the problem is that i dont have navigation bar so i cant add or edit any Sources!!!

so how i may fix that? iphone v 1.0.2 i ues xp.

thanks for help.