As far as I know, it should still be working for you if it worked the last time you used it.  Without knowing more about the settings (eg. are there a lot of Sage 50: xxxx.sai files listed?) and what you are trying to accomplish (eg. design or running a report or running a form) it's hard to tell you exactly what to do.

However, assuming you are just trying to run a report, you should use the MS Office Documents program on the Reports menu.  It will automatically connect you with the appropriate open database.  Just follow the prompts to select the correct path to the report, database if it is not already selected, and enter the proper username and password.