PaperKnife+ v1.1
- Fixed typo in Unlock tool description ("REOVE" → "REMOVE") — thanks @Gabbar-v7
- Fixed history showing original file name instead of output file name after processing (fixes #4)
- Fixed merge tool rejecting same file added multiple times (fixes #13)
- Fixed watermark transparency not applied to output PDF (fixes #9)
- Added export saved signature as PNG (feature #10)