I'm also getting a similar problem.
The dialog box states that it is 100% complete Step 1 of 2 and found 699,347 files
Not doing a deep scan.
When I used the wizard and directed it to scan just the folder I'm interested in it never lists the number of files but hangs at 100% complete.
looking at Task Manager/Resource Monitor has the recuva process using 5.2-5.4 GB of RAM no matter how I run it (Wizard or Advanced)
Computer Details:
Win 2008 R2 6GB RAM
10TB volume I'm trying to scan
Recuva version 1.43.623 (64-bit)
Any thoughts?