[Userhelp] How to Upload Files

Dear Chebucto Technical Support, I am writing to you on behalf of the Peninsula Urban Gardens Society ( http://pugs.chebucto.org/). I am the person in charge of maintaining the Peninsula Urban Gardens Society website, but unfortunately the computer I was using stopped working and I have lost the software and settings needed to upload updated files onto our website. Please advise me what software and settings I should use. Thank you very much for your help. Best regards, Mary Ansell