Thanks Meter 609
Join Date: Nov 2012
Location: Los Angeles, CA
CROMi 3.x was based on the Asus JB 4.1 firmware and is really old, outdated and will not get developed anymore.
sbdags moved on to CROMi-X based on the Asus 4.2.1 firmware, the latest version - hot off the presses a few days ago - being 5.2.3.
Look for his thread in the Development section and prepare yourself: The thread is 331 pages long (3300 posts and counting) and growing by 2 or 3 every day!
Read the OP carefully and use the search tool for stuff you don't understand.
You can dirty flash (flashing without wiping anything but cache and Dalvic) to the latest CROMi-X version, but it is not recommended. You may run into a lot of legacy problems if you don't start with a clean slate. You should do a factory wipe in TWRP before you flash the new rom which will wipe your apps, but not your data. It is worth investing the time to clean install CROMi-X. You probably would spend way more time troubleshooting if you dirty flash.
Check out Titanium Backup, use the backup function of your custom launcher if you have one, and restoring your system is a matter of an hour of your time with a little planning and practice.
First thing you have to do though, is update your bootloader and probably your recovery. Check the OP for instructions.
sbdags not only created a wonderful rom for the TF700 but also a very fun community of people hanging out in his thread. Come and join us