Recuva: can I enter parameters?

Tried to recover documents from C drive. Message said "Stage 1 of 3: scanning drive for deleted files". Took nearly 4 hours then failed with comment "Failed to scan following drive C: Ran out of memory". The progress monitor got to 96% and only 20mins left when it failed. This was set to recover all documents; is it possible to enter parameters to only retrieve Excel [.xls] which are the most important to me? Perhaps then I would have enough memory. Thanks in advance for any help.

[Recuva.com v.1.44.778:MS Windows 7 Pro 32bitSP1:Pentium Dual-Core CPUT4500@2.30GHz:4.0GB RAM]

I should try Recuva v1.43 from Filefhippo to see if this fixes the problem. You can enter search parameters in the File/Path box in Advanced mode, but this won't fix much as Recuva will still scan the entire partition and then filter the results to show you.