Restoring old tabs via a Carbonite sessionstore.js file

I had a Firefox crash this morning that, upon restart of Firefox, did not let me restore my previous tabs. I tried to restore (using the Windows 7 restore previous version function) a previous session from yesterday, but I don't think I went through the steps correctly. Then I realized I have a backup version from Carbonite available.
I downloaded it to my desktop. Would someone mind walking me through the steps of correctly restoring the file?
Thanks very much.

Hi Crumbleey, Firefox will only look for sessionstore.js in the same location. Make sure Firefox is not running when you do the restore, or you can copy the file in by hand from wherever the restore is willing to place it.

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