I'm with FSX and bought GSX version 2.9.5. in 2013.
Well no, version 2.9.5 came out only last week.
Also, the Base GSX
NEVER controlled ANY jetways!!! Only GSX Level 2 CAN control jetways but, only if they are made with GSX, or with SODE. Same as always, GSX will not control default Jetways that moves with CTRL+J
However, when you install GSX Level 2, all DEFAULT Jetways at DEFAULT airports ( 3rd party airports are unaffected ), will be replaced by a custom GSX model, to SHOW you how they have been improved. Of course, those will now work only in the Trial airports.
But, it's not as if we "hijacked" your default Jetways. If you want to go back to them, you can do it at any time, using the GSX Control Panel, to restore the default jetways
This is of course clearly explained on the first pages of the GSX manual, when it discusses how the GSX L2 Trial works.