I know nothing of installing Squetch, however....
if you have a situation you can repeat that crashes A:M, (and does it in v17) that would be a good thing to bundle up and submit to AMReports
www.hash.com/reports
You'll need to get an account name and password from Jason but he'll set you up.
Crashes get fixed quickly.
Back to Squetch.... of course you saved your work in versions as you went along so it would be easy to step back and find where the departure between written process and your result first started.