Cannot get past opening screen

Support
1

Everything worked splendidly when I activated this the first time. However I decided to back up and then factory reset my synology NAS, where the Photostructure library was. It’s certainly true the library at Y: is missing. and now I cannot seem to get past this screen:

[Window Title]
PhotoStructure

[Content]
Your library at Y:.photostructure is missing.
You can either:

  1. Mount or turn on that drive, then click “Try again”, or
  2. Pick a different directory by clicking “Pick a new library”, or
  3. Give up for now by clicking “Quit”.

[Try again] [Pick a new library] [Quit]

Help please!