You can restore your timers.
Autotimers are used to create timers. If all your timers are made using Auto timers, you only need to restore the autotimer file.
Navigate to /etc/enigma2
Save autotimer.xml to PC.
Flash new image
Configure image to a basic level
Stop image from running using telnet command "init 4"
Transfer back the autotimer.xml file
Restart the receiver with telnet command "init 3"
Guide to telnet commands in my signature.