You may choose your default solvers using the IDE. In particular under the file options choice and the solvers tab you get a table like the following. This permits you to you revise the solver defaults at the local, project or system scope where the scope is specified by a selection in the box at top left of the screen shot below. In using this X means this is the default solver choice for scope of activities. You should make sure you have X's in this table for the models you wish to run. You obtain these by clicking on any of the small squares ordinarily for solvers that reflect full license status (as identified in the second column on the left). Note if all the solvers reflect Demo status then your license file is likely not properly installed.
