How can I do this now that my VM Ware trial period has expired?
Assuming that you had Dropbox running, you should be able to recover your files easily. You just need to install Dropbox on your computer and let it replicate the files from their server down to your computer. You'll need to follow the instructions on the dropbox website to install on your system and will need the userid and password used to create your dropbox account.
Once you do that, you can upload from your computer to the IDE, although the IDE will only support certain browsers to upload files. IE is not one of them.
Or, I believe that if you're intent on it, there's a mechanism for getting another cs50 license, but I'll defer to someone like @curiouskiwi to speak to that.