DSynchroize real time sync not working for me

Downloaded DSynchronize today with the intention of real time syncing 2 external hard drives (D:/ and E:/). OS Win11. Performed a standard sync from D to E, then from E to D, then turned on real time sync. Noted that the background processes were running properly in Task Manager. Closed out of Portable Apps and noted that the background processes disappeared. So question one, do I need to keep PortableApps app open all the time for real time sync to work? Question 2, even when I opened Portable Apps back up and the processes reappeared in Task Manager, real time sync still isn't working. I placed a test file on D;/, it did not sync to E:/. I placed at test file on E:/, it did not sync to D:/. I'm sure the software works as intended and I have just set something up wrong. I couldn't find a tutorial for the app so am turning to this forum in hopes of finding help. TIA for any assistance.