desde recovery sin wipe data, los otros si...
sigue estos pasos
Upgrade from my previous CM7 build - without data wipe / factory reset
This approach will maintain all of your installed applications.
In some cases there might be problems especially when using apps for linking
applications to SD ext partition (S2E, etc, Link2SD is OK, see the last step)
So if you are having any problems perform full wipe and install apps again instead.
- put rom ZIP and gapps ZIP to SD card
- reboot to ClockworkMod Recovery
- make a backup of your current rom using menu: Backup & Restore / Backup
- wipe cache
- advanced / wipe dalvik cache
- mounts & storage / format system
- install zip from sd card - choose to install rom ZIP
- install zip from sd card - choose to install gapps ZIP
- reboot
- if using Link2SD - launch it and choose to recreate mount script, reboot