If you've got both versions of camera in your app drawer I'm guessing you dirty flashed the ROM, which has most likely caused your problems. Clean flash the ROM and see if it fixes your issue. This is why I'm totally against dirty flashing anything.

I don't understand how you don't have space to back up your apps, I have a backup of every app I've ever used and still have tons of space left over. The fact that you mention backing up settings troubles me, restoring system settings after flashing a new ROM will more than likely cause problems for you.

When you're flashing a ROM don't do it the lazy way, do it the right way, perform a full wipe (cache/dalvik cache/factory reset/system) and start clean. It only takes a few minutes to setup your ROM from scratch. Restore your apps but don't restore any system data.

Sent from my Evita
OnePlus One | crDroid/AK | TWRP 2.7.1.1

Do not PM me asking for assistance, that's what my Q&A thread is for!