Depending on which version you go with, please check the installation guides and obtain the software found here (thingworx platform, postgresql version): http://support.ptc.com/
For 7.3, https://support.ptc.com/WCMS/files/172180/en/Installing_ThingWorx_7.3_1.pdf
system requirements: https://support.ptc.com/appserver/wcms/standards/fileothumbredirect.jsp?&im_dbkey=172182&icg_dbkey=522
NOTE: we currently do not support Postgresql 9.5, so please go with the latest 9.4 available (9.4.11)
Note all of the current extensions in your system. Export all entities, export all data. Then also export everything to storage. Now go to your ThingworxStorage folder -> exports and copy the contents elsewhere (once the export finishes) - for backup purposes..
Stop tomcat, go to tomcat/webapps folder and remove the Thingworx directory and the thinworx.war. Then rename your ThingworxStorage and ThingworxBackupStorage to something else (to ensure it's not being referenced anymore and not to lose the data before the upgrade).
Follow the installation guide to install postgresql db and run the scripts ( 2 of them) from the PTC downloadable .
Install the new Thingworx.war . Place the folder from the export that you backed up in the previous step into the new ThingworxStorage/exports. Start the tomcat.
Start the application. Import all of the extensions you had in your original system. Now do the export from storage and first import all entities ignoring subsystems (check), then import second time without ignoring subsystems (uncheck). Import the data - depending on how big your data is , this step will take a while. You can check application log for completion.
