Madgraph 2.9 Syntax in Madgraph > 3.1

Hello,

I have a very similar question to the one posted here:
https://answers.launchpad.net/mg5amcnlo/+question/707138

I would like to specify 2.9 syntax in my process, but cannot use "set acknowledged_v3.1_syntax True" because the madgraph configuration file in my environment is not writable. ie, I get:

Read-only file system: '/cvmfs/atlas.cern.ch/repo/sw/software/23.6/sw/lcg/releases/MCGenerators/madgraph5amc/3.5.3.atlas5-e6f9c/x86_64-centos7-gcc11-opt/input/mg5_configuration.txt'

The answer is most likely no, but is there a way to use 2.9 syntax without altering mg5_configuration.txt?

I have also tried using commands like this:
generate p p > t~ b wp+ NP<= 1 aEW<=0 [QCD]

And my events are generated correctly, but Madspin fails stating:
MadGraph5Error : Decay processes cannot specify squared orders constraints.

In the post above, they asked if "aS/aEW are constraints on QCD^2/QED^2 (?)", and I am wondering about this too.

This new physics process runs with Madgraph 2.9 with just "generate p p > t~ b wp+ [QCD]", where it also correctly runs in Madspin as well.

Any information would greatly be appreciated.

Thank you!
Jason

_________________________________________________________________________________________________________
Here is some more info from the log:

generating the production square matrix element
generate p p > t~ b wp+ NP<=1 aEW<=0 --no_warning=duplicate;define pert_QCD = -4 -3 -2 -1 1 2 3 4 21;add process p p > t~ b wp+ pert_QCD NP<=1 aEW<=0 --no_warning=duplicate;
Done 2.527
generating the full matrix element squared (with decay)
generate p p > t~ b wp+ NP<=1 aEW<=0, (wp+ > b~ t , ( t > b w+ , w+ > all all ) QCD=99), (t~ > b~ w- , w- > all all QCD=99) --no_warning=duplicate;define pert_QCD = -4 -3 -2 -1 1 2 3 4 21;add process p p > t~ b wp+ pert_QCD NP<=1 aEW<=0, (wp+ > b~ t , ( t > b w+ , w+ > all all ) QCD=99), (t~ > b~ w- , w- > all all QCD=99) --no_warning=duplicate;

And this is my Madspin configuration:
#************************************************************
#* MadSpin *
#* *
#* P. Artoisenet, R. Frederix, R. Rietkerk, O. Mattelaer *
#* *
#* Part of the MadGraph5_aMC@NLO Framework: *
#* The MadGraph5_aMC@NLO Development Team - Find us at *
#* https://server06.fynu.ucl.ac.be/projects/madgraph *
#* *
#************************************************************
#Some options (uncomment to apply)
#
# set seed 1
# set Nevents_for_max_weight 75 # number of events for the estimate of the max. weight
# set BW_cut 15 # cut on how far the particle can be off-shell
 set max_weight_ps_point 400 # number of PS to estimate the maximum for each event
#
set seed 1325
# specify the decay for the final state particles
decay wp+ > t b~, (t > w+ b, w+ > all all)
decay wp- > t~ b, (t~ > w- b~, w- > all all)
decay t > w+ b, w+ > all all
decay t~ > w- b~, w- > all all
decay w+ > all all
decay w- > all all
decay z > all all
# running the actual code
launch