Ubuntu has discontinued wubi.exe and i know that when you install the ubuntu 13.04 developer version with wubi you can only login as a guest. I have previously installed ubuntu 12.10 with wubi.exe if i upgrade to 13.04 will everything work normally?
Yes you can upgrade a Wubi install to 13.04, but Wubi support has been officially pulled by Ubuntu, therefore it's not recommended to do this.
Confusingly though, the 13.04
If you do decide to upgrade which is generally not recommended on Wubi installs, then review this: Upgrading my Wubi 11.04 to 11.10 Also consider that you may not be able to get support from this site or other Ubuntu support sites.