Ed Finkler, a long-time user of SFTPDrive on his Windows machine, has noticed something a bit odd lately when using the new Zend Studio (Eclipse):

For some reason, ZSfE just doesn’t show me my “k:” drive (the SFTP mount) when browsing for a project directory. This throws a real wrench in my usual workflow — ZS 5.5 had built-in SFTP support, and I could also use the local mount if I wanted.

Finding nothing in the traditional places, he's made this blog post hoping someone might have the answer. Turns out that the fix (as provided by Josh Johnston) is to create a new project around a new Remote Folder.