When I click on the .nod file to open my site, I receive the above warning, along with the text

NetObjects Fusion has detected an unstable file and will now recover your site. The time required for this process varies. if you exit now, NetObjects Fusion will recover your file the next time you open the site.

Irrespective of whether I click OK or Exit, the next time I attempt to open the site, I receive the same message. Consequently, I cannot access any part of the site, or do anything with it.

Can anyone suggest how I may obtain access via NetObjects 2015 - so sad because I am in the middle of updates and I can't do anything. Help!