Greetings! I as wondering wether recuva can recover not just files but also a whole folder??
I assume you mean can one select a folder so that Recuva can restore its contents, rather than can Recuva restore the folder structure for recovered files (which is achieved by checking Restore Folder Structure in Advanced mode).
Not per se, as Recuva is a file recovery prog. However after running your scan you can select the folder by typing the folder name into the Filename or path box as documents\foldername, for example. Then select all files by checking the top l/h box, and start the recovery (with Restore Folder Structure still checked of course). This will restore all files and subfolders of your initial selection.
You can also type the folder name into the Filename box before starting the scan, and carry on from there. This will give the impression of running a shorter scan, but Recuva still has to scan every file on the disk before presenting the results, so no time will be saved.