Deleting on a back-up drive and Selective backups

[headcase]

I was quite stupid when I first got my WD back-up drive. I copied all my folders from my pc's hard drive onto the back-up drive before I discovered Retrospect. The result is that I now have everything backed-up twice and the drive is full!

 

My first question is will it be ok for me to just delete all the files I put on the back-up drive? Perhaps it would be best to re-format the back-up drive and start again?

 

Secondly I would really like to do a selective back-up as I don't need all the software to be backed-up. Is there anyway I can achieve this - the wizard seems to make me back-up the whole hard disk?

 

I have Retrospect Express

 

Thanks for any help