pgAdmin4 windows installer should restrict the user not to install 32bit and 64bit parallelly.
It should not allow pgAdmin4 install x64 if x32 is installed Or vice versa, only upgrade of the same type should be allowed.
If user has already installed 32bit installer and try to install 64bit it should throw an error as "You already have a 32bit installation of pgAdmin 4. Please uninstall this before installing the 64bit version."
If user has already installed 64bit installer and try to install 32bit it should throw an error as "You already have a 64 bit installation of pgAdmin 4. Please uninstall this before installing the 32 bit version."