Detail information on upgrading your old installation of Personal TimeSheet for Outlook with new version and update.
Download the latest setups to your system from https://www.assistmyteam.net/PersonalTimeSheetSP/download.asp.
Your Windows OS bit is not taken account. So, ignore if you have 32-bit or 64-bit Windows. Concentrate on the bit-ness of Microsoft Office and download and install the matching setups.