Default Can I restore user data in a new ROM ??

Just had a question,

If I made a backup of my current apps (User data) using TWRP recovery on my kindle fire HD 7 (2012), and then I flash cm11 onto the kindle, AFTER I finish flashing cm11 is it possible to then flash my User data onto cm11 or would that mess it up?

Thanks in advance and Cheers

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