Sorry - I'm a little confused, I thought that you had uploaded PowerStore to your remote site (with 1&1).
To run PowerStore as a 'working' store, yes - it will need to be uploaded to hosted space on a remote server, - WebAssist recommends 1&1 as a hosting provider - so you may just need to renew or re-activate your hosting plan to get going again.
If you just want to get used to PowerStore or do a little prepatory work on it, you can install it on your local machine provided you have set up a testing server and can process dynamic (PHP) pages. If you could let us know a bit more about your situation/setup perhaps we can help out a bit more easily!
in Domain Overview it shows my site domain (as a link), Type is 1and1 Domain, Desination is Web Space (/.), Status is Ready
When I click the domain link it takes me to this:
Domain name (my site).com
Document root /homepages/21/d159868876
Domain is Additional domain
My complete Web Server Path is /homepages/21/d159868876/htdocs/.
So I uploaded PowerStore to my domain.com with the destination as / - is this where I am supposed to upload it to?
Now, how do I get to my site to run PowerStore?
I have a Business Package with 1 and 1 with a couple of domains.