Mashups/Masters not able to view or edit >> Have you tried to restart the ThingWorx server to see if the issue remains? you might need to open up a technical support ticket to have some further investigation.
Seeing additional menu item in Modeling menu >> The additional item is the Project property which was optional and now becomes madantory since ThingWorx 9.0+.
Getting few labels with programmatic words. >> This is because the cache in your browser is not updated, you can fix it by clear your cache and access Composer again.
Mashups/Masters not able to view or edit >> Have you tried to restart the ThingWorx server to see if the issue remains? you might need to open up a technical support ticket to have some further investigation.
Seeing additional menu item in Modeling menu >> The additional item is the Project property which was optional and now becomes madantory since ThingWorx 9.0+.
Getting few labels with programmatic words. >> This is because the cache in your browser is not updated, you can fix it by clear your cache and access Composer again.