I used the 211107 version from the archive as its a newer version but heres a solution I found that works for your problem.
Open the commands.ini file and replace the first set of commands under the heading [WINMX] with this lot then save the file and restart WPCC
[WinMX]
#Usercmd Redirect
#Usercmd /kick
#Admincmd /kickban
#AdminCmd /ban
#Usercmd /unban
#Admincmd AddAdmin
#Admincmd RemoveAdmin
#Usercmd PrintChatStat
#Usercmd PrintWriteRanking
#Usercmd PrintRawWriteRanking
#Usercmd PrintTimeRanking
#Usercmd PrintRomRanking
#Admincmd PrintIP
#Admincmd SetInputWnd
#Admincmd EnableUserCmd
#Admincmd DisableUserCmd
#Admincmd HideIDOn
#Admincmd HideIDOff
#Usercmd WelcomeMsgOn
#Usercmd WelcomeMsgOff
#Usercmd SetWelcomeMsg
#Admincmd ShowNickChangeOn
#Admincmd ShowNickChangeOff
#Admincmd ResetChatStat
#Admincmd ClearAdmin
#Admincmd NoShareBlockOn
#Admincmd NoShareBlockOff
#Admincmd AutoRomBlockOn
#Admincmd AutoRomBlockOff
#Admincmd SetRomBlockTime
#Admincmd TraderBlockOn
#Admincmd TraderBlockOff
#Admincmd HideCommandOn
#Admincmd HideCommandOff
#Usercmd PrintUserStat
#Usercmd SetRedirectRoom
#Usercmd PrintRedirectRoom
#Usercmd WriteMessage
#Usercmd ReadMessage
#Usercmd ClearDelay
#Nickname #Message
#Noname
#Private #Message
#AdminMessage
That worked ok for me with the scrollwheel , it might be that the room Tag sets the contents of the command selection but I havent had time to dig too deep and there where no RCMS rooms on view at the time I looked.