Jobs not running as scheduled

We are using FTP voyager Installed by a system integrator for the purpose of scheduled EDI transfers. The scheduler is set to run every 30 minutes, but actually runs every 1.5 hours.

It does not seem to be overtly generating an error. It even states the next scheduled run is 1.5 hours from the last.

Otherwise works as expected, and  do not want to directly replace it unless this is unsolvable.

Is there any support or suggestions for diagnosing this further?

I understand the product if free, but not sure if that means supportable or as is.

Please and thank you.