14 hour recovery assistance

Recuva recovered about 1 TB of photos most in good condition from external hard drive that was accidentally formatted. After receiving the recovered list, I had to disconnect the drive and reconnect later without turning off the computer and keeping the recuva program active. Reconnected drive has the same drive letter as when Recuva performed the scan, but I am not able to recover files. now. Will I have to start the process over again?