I would suggest you to continue with upgraded platform rather than downgrading. You need three pieces for complete update:
1) PSoC 5LP/KitProg update: For this, just install the latest PSoC Programmer -> Open PSoC Programmer -> connect BLE Dongle -> Go to Utilities -> Click on Upgrade Firmware. Wait for complete upgrade.
Note: Before upgrading, the dongle will switch to bootloader mode which is a new USB device, requiring new USB enumeration. If event after enumeration the upgrade soes not move, then disconnect and reconnect the dongle and try again.
2) CySmart HEX 220.127.116.11: Download the latest file 'BLE Dongle CySmart 18.104.22.168.hex' from http://www.cypress.com/CY8CKIT-042-BLE. Use PSoC Programmer to install this file to the PRoC BLE device on dongle.
3) CtSmart PC Tool: Download the latest version of the tool (1.1) from http://www.cypress.com/documentation/software-and-drivers/cysmart-bluetooth-le-test-and-debug-tool?source=search&keywords=cysmart.
Now your system should be able to detect the dongle correctly.