We would like to have a date showing the last time a project was updated; I haven't found a field for this -- is there one?
Which version of Robohelp are you using? If 2019, are you using Classic or New UI. Please include the full number including patch numbers.
There are date fields (really a special type of variable) you might be able to use, but how you insert them depends on your version.
Showing for you or for users?