To view or save your patterns on your home computer you will need to have Adobe reader installed (most computers come with Adobe pre-installed). If you need to update to a newer version you can find it here:
You can find all your patterns in the 'Pattern Library' section after you have signed into your LoveCrafts account. Click on the pattern you would like to download and it will open in a new tab. To download and save your patterns click on the small arrow on the right. It will probably look something like this:
You can download or print your patterns as many times as you need to and they will always be stored in your account if you need another copy in future.