Problem Booting cyanogen ( not boot loop) help :(

[Democrat]

Hello ,,
about a month ago , i installed cyanogen on my nexus one !
was working like a charm
i installed an application that changes the battery icon ( i dont remember the name of this app ) well after i applied , it said to reboot . then it never booted again , i get the cyanogen logo blinking
can i fix it without loosing data ?
please help me ,
thank u