Sorry about that - thanks for reporting it.

I haven’t been able to reproduce a freeze at 99% yet. If you’re willing, could you share a bit more detail (approx folder size / number of files, and whether CPU or memory spiked near the end)?

If you’re open to it, I’d also be happy to jump on a quick call or screen share to debug this together — totally optional. You can reach me at my support email mentioned in the About DedupX menu item. I’d really like to track this down and fix it.