Which version are you trying to download that you can't access ? What you should see currently:
AirlandFS.zip (858 kB)
flightsimsquadron-blue-thunder.zip (61 MB)
flightsimsquadron-airwolf-airland.zip (69 MB)
flightsimsquadron-mh6.zip (88 MB)
flightsimsquadron-airwolf.zip (76 MB)