Sample rate problems

I tried to convert from 48 to 44.1 khz then when i went back to my previous 48 khz version all the samples are off time. is there any way to reverse this ?

You converted the audio files to 44.1, so when you go back to your previous version it references to the same audio files, so they are in 44.1 now instead of 48Khz. You had to tell Cubase to Keep both files during conversion…