TEST1 with matlab 8.3:
OK. thank you !

TEST2 with matlab 7.6 :
set path with genpath (may be it would by easier to change the command in the manual…):
addpath(genpath('F:\spm12\toolbox\wfu_pickatlas'));

then the paths include the following :
F:\spm12\toolbox\wfu_results
F:\spm12\toolbox\wfu_tbx_common\spm_lite
F:\spm12\matlabbatch\cfg_basicio
F:\spm12\toolbox\deface
F:\spm12\toolbox\Shoot
F:\spm12\toolbox\OldSeg
F:\spm12\toolbox\OldNorm
F:\spm12\toolbox\Longitudinal
F:\spm12\toolbox\FieldMap
F:\spm12\toolbox\DARTEL
F:\spm12\config
F:\spm12\matlabbatch
F:\spm12\toolbox\wfu_pickatlas
F:\spm12\toolbox\wfu_pickatlas\MNI_atlas_templates
F:\spm12\toolbox\wfu_pickatlas\MNI_atlas_templates\legacy
F:\spm12\toolbox\wfu_pickatlas\MNI_atlas_templates\legacy\EXTRAS
F:\spm12\toolbox\wfu_pickatlas\MNI_atlas_templates\legacy\EXTRAS\ORIGINAL
F:\spm12\toolbox\wfu_pickatlas\MNI_atlas_templates\legacy\EXTRAS\PCG_Modified
F:\spm12\toolbox\wfu_pickatlas\TD-ICBM_MNI_atlas_templates
F:\spm12\toolbox\wfu_pickatlas\TD-ICBM_MNI_atlas_templates\legacy
F:\spm12\toolbox\wfu_pickatlas\mouse_atlas_templates
F:\spm12\toolbox\wfu_pickatlas\rhesus_atlas_templates
F:\spm12\toolbox\wfu_pickatlas\vervet_atlas_templates

but same error :

??? Error using ==> wfu_spm at 169
Unknown action string ('Quit'). It possible that
F:\spm12\toolbox\wfu_tbx_common\spm_lite is incorrectory listed in your path and should be removed.

Error in ==> spm at 9
wfu_spm(varargin{:});
??? Error while evaluating uicontrol Callback


may be an important information: installation is on a server (windows2003) with 4 versions of SPM installed and many users.
to start SPM, the user choose the SPM version which runs a script: for SPM12 it starts with :
rmpath (genpath('F:\spm2'));
rmpath (genpath('F:\spm5'));
rmpath (genpath('F:\spm8'));
rmpath (genpath('F:\snpm5b'));
addpath(genpath('F:\spm12'));
addpath(genpath('F:\spm12\toolbox\wfu_pickatlas')); 
addpath(genpath('F:\SnPM13')); 
spm

I think that adding the path for pick-atlas is not useful (same result with or without).