I've selected incorrect license (the limited version with STAAD.Pro license), how do I change it to use STAAD Foundation Advanced license?
There are 2 license types for STAAD Foundation Advanced: a full STAAD Foundation Advanced License (which allows to use all foundation types in the program) and STAAD.Pro License (which allows to use only Isolated, Pile Cap and Combined footings). Once you start STAAD Foundation Advanced, 'The License Configuration' dialog box pops-up, select the 'STAAD Foundation Advanced License' in the License Type and you are all set.
However, if you do not see the License Configuration window pop-up once you start STAAD Foundation Advanced (this happens if you had at some point unchecked the 'Show on startup' checkbox), go to the 'License Configuration' in the horizontal graphical menu bar on top of the window.
This will bring the 'License Configuration' window; select 'STAAD Foundation Advanced License' (as shown above) in the License Type and you are good to go.