Thank you for your enquiry.
PATGuard 1, or earlier versions, are not compatible with the PT350. The only versions of our software that are compatible with the PT350 are PATGuard 2 or PATGuard 3.
Please see the following link for a 30 day free trial of PATGuard 3
In addition, please also see the following link for help downloading into PATGuard 3.
Finally, if you want to import your old database into the PATGuard 3 trial, please make sure you make a copy of your old *.mdb file, as once opened in PATGuard 3 it cannot be reopened in an older version.