If our organization is less than two years old or has moved their headquarters or 75% of the board less than two years ago, are we still eligible to file in the window?

Yes, but your application cannot claim the 3 points for Established Local Applicant.

Remember that for the translator window, the 25 miles is measured from the reference coordinates of the community that the translator will service (based on reference coordinates that you can find in FCCdata.org by doing a search by community name) and not the community that the primary station is licensed to (or transmitter site in the case of LPFM stations).