qualify upgrade script

Author: scivision

scripts/MatlabReleaseUpgrade.m

@@ -1,6 +1,13 @@
 disp(matlabRelease())
 
+assert(isMATLABReleaseOlderThan('R2025a'), "Matlab R2025a changed the upgrade process, use the GUI.")
+
 r = fullfile(matlabroot, "bin", computer("arch"));
 cmd = fullfile(r, "MathWorksUpdateInstaller");
+if ispc()
+  cmd = cmd + ".exe";
+end
+
+assert(isfile(cmd), "MathWorks Update Installer not found at %s", cmd)
 
 fprintf("Run this command in Terminal to check for Matlab upgrade:\n\n%s\n\n", cmd)