How to use ROM Toolbox to backup and restore files, apps etc between factory resets?

[pmedwards25]

Hi, I'm looking to factory reset my CM11 M7 Nexus 4, to solve the issue of Themes Provider crashing. I've got ROM Toolbox Pro, but I'm unsure how to backup and restore all my stuff after factory resetting.

1) How do you do this? (A link to a guide will do)

2) Is this really necessary, or is it alright to just clear the cache?

Thanks for any help!

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