Rogue Amoeba has released Fission 2.2.2, a small maintenance release for the audio editor that fixes a rare crash (caused by closing a window) and a regression of Apple Lossless transcoding. The update also adds a hidden preference to disable the limit on Smart Splits, improves logging in the Saving pipeline (with more detailed optional error reporting available), and is more forgiving when importing slightly malformed FLAC files. Additionally, the Mac App Store version addresses several changes that Apple made to its Gatekeeper system. ($32 new from Rogue Amoeba with a 20 percent discount for TidBITS members, free update, 14.5 MB, release notes, 10.7+)
Extract Directly from Time Machine
Normally you use Time Machine to restore lost data in a file like this: within the Time Machine interface, you go back to the time the file was not yet messed up, and you restore it to replace the file you have now.
You can also elect to keep both, but the restored file takes the name and place of the current one. So, if you have made changes since the backup took place that you would like to keep, they are lost, or you have to mess around a bit to merge changes, rename files, and trash the unwanted one.
As an alternative, you can browse the Time Machine backup volume directly in the Finder like any normal disk, navigate through the chronological backup hierarchy, and find the file which contains the lost content.
Once you've found it, you can open it and the current version of the file side-by-side, and copy information from Time Machine's version of the file into the current one, without losing any content you put in it since the backup was made.