Playbook OS changing with cpf/pload (same app I believe, just two names)
You can try as antiRIM above says, or try this (hopefully one or the other will work for you):
Download cfp.exe and PB184.108.40.2068.exe (google them I can't remember exactly where I got them)
Then nuke, wipe and reinstall:
Put all files in in a new folder (call it, for example 'pb') on your 'c' drive
Open cmd and type:
1, "CD C:\PB"
2, "CFP -U NUKE -A"
3, "CFP -U WIPE"
Then run (double click) PB220.127.116.118.exe
That's it. You are back to 2.01.668 (if you were up to 18.104.22.1680 you can't go back to 22.214.171.1248).
Then put on developer mode, and do software update. You will then be back to 126.96.36.1990).
The whole process took me about 3 hours I think.
I am totally enjoying my PB with 188.8.131.520, running lots of great PB native apps, and Android sideloads.
Good luck, be patient.