I use Windows 7 64-bit.
It hangs after like 2 minutes after either searching or recovering.
If I click cancel it just keeps saying canceling.
If I kill from the task manager, it takes like 10 minutes to shut down.
Also,, it seems like it hangs when it runs into certain files.
If I try to recover other files than the ones that hang, it works.
If I try to even recover one file that causes freeze, recuba first indicates it'l take few second to recover, then keeps changing to 1 day or more in few seconds.