If you are still trying serial, you have to set the local and target configurations within the application. Start with local, this is the config used when running ME station on your laptop and for downloading to the PV+. You should only add the Serial DF1 driver and browse for the SLC by right clicking the driver and selecting "Show all Devices" and then "Start Browsing". If you can see the SLC you can run your app to test. Now make a shortcut (topic) and have the SLC high-lighted and apply. Use the copy button to make the target config. Thsi is the one the PV+ will use to comm to the SLC. Note that the address of the SLC should be 1.
Disconnect cable from SLC and connect to PV+ and within the transfer utility, browse for PV+. If it is found you can download. Sometimes have to collapse and expand comm tree to find PV+.
Disconnect cable from laptop and connect to SLC. It should be working. I did this Monday, so it is still fresh in my mind..