Hey!
Im using the version called: Malcolm_v200, it also comes with another maya file called Malcolm_v2002 and the pickers in there.

I have a question about the picker, some days ago it was working fine but recently just started telling me this:

Error: ValueError: file <maya console> line 2: No object matches name: model:controls when i clicked the "all" button (also any button i pressed didnt select the part i clicked for)

And also: Change current Namespace to: and i get options like malcolm_v200, model or model:model

It works with model:model now, but its not a safe solution for me

Im really scared to close the program because i dont want my work to fail or something (In the first one with the problem, it didnt save the keys, so i had to redo everything)

I dont know if its maya or the picker, i rlly dont get whats happening
Sorry for my english, or if some phrases sound weird, its not my first language.

Thank you to anyone that helps ;;;;

It sounds like you might not have referenced the character rig in. You need to reference with the namespace option for the buttons to all work correctly. See the instructions: https://www.animschool.com/MalcolmInfo.aspx