If you had already saved it before, even for once, with a specified name, the recovery file should be present at the same location where you saved the original file. A file named Recover_*your_file_name*.fla should be present. If the file was never saved, it should be available at this location on Win machines: %LocalAppdata%/Adobe/Animate CC 2018/en_US/Configuration/ (with a name like: Recover_Untitled*.fla)
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