Move file and folder in the right 32/64 bit application folder

I try to portabilize an app developement in 32 & 64bit architecture.

The versions of program are stored in:
%PAL:AppDir%\program32
%PAL:AppDir%\program64

In %PAL:DataDir% there's a folder:
SETUP
and a file
program.ini.

Execute the right version of the program is simply:
[Launch]
ProgramExecutable64=program64\program.exe
ProgramExecutable=program\program.exe

My goal is move the folder SETUP and the program.ini file in the folder content the right 32/64 version of program.

I've created a custom.nsh file put in %PAL:AppDir%\AppInfo\Launcher folder:

${SegmentFile}

${SegmentInit}
${If} $Bits = 64
${SetEnvironmentVariablesPath} FullAppDir $EXEDIR\App\program64
${Else}
${SetEnvironmentVariablesPath} FullAppDir $EXEDIR\App\program
${EndIf}
!macroend

It's not flour on my sack.
I found it somewhere and tried to adapt it to my needs.
If I did not understand, create the FullAppDir variable containing the path I need

Then
[FilesMove]
program.ini=%FullAppDir%
[DirectoriesMove]
SETUP=%FullAppDir%

But not working...

A little bit of help will be appreciated