Resco Mobile CRM Woodford customizations (a.k.a. mobile projects) are stored as Note attachments to resco_mobileproject’s records on Dynamics CRM server (more on this here).
Therefore, be careful when doing a bulk delete of your Notes!
You might also delete your mobile projects.
To avoid this unfortunate state, please exclude Note attachments to resco_mobileproject’s records from your bulk deletions.
And all shall be well.