Not being a computer guru I'm the King of Undo.
I'd think about what I'd done recently then check the easiest files first and so on to more difficult uninstalls if necesary....
First, I'd check the scenery file by going to the scenery library and simply removing the check mark in the box for the IS Delhi scenery.
It doesn't remove or change the add-on scenery, it simply won't load at FS9 startup until place the check mark in the box again.....a very simple procedure.
Then perhaps, read again, the FSIUPC update text file and make sure it's installed correctly. It has been a long time since I've upgraded.
When upgrading FSUIPC I believe you need remove or delete the old DLL file.....again not positive of this.
You should only have one FSIUPC.DLL file in the Modules folder with the recent date.
It is much too early to think about uninstalling and reloading FS9
Not with all the expertise we have (not me) here in the forums.
Acer Predator AG3620-UR308, 3rd Gen. Intel Core i7-3770 processor 3.4GHz with Turbo Boost 2.0 Technology up to 3.9GHz (8MB Cache), NVIDIA GeForce GT630 (2GB), 2 TB 7200RPM SATA Hard Drive, 12GB DDR3 SDRAM, Windows 8