Hi there,
On Linux, this is possible using the extract-only option for tne .run installer, and then installing the enclosed rpm. i.e.
./Bifrost_2.0.5.1_Maya2019_Linux.run --tar xvf
(This extracts all the files. The rpm is what you need.)
rpm -iv --force ./Bifrost2019_64-2019.2.0.5.1-2.0.5.1.x86_64.rpm
(The –force ensures that the module .mod files for the plugin get overwritten with the new installers data. This may or may not matter depending on your setup.)
I did need to “chmod +x” the .run file before starting the process also.
On windows this isn't currently supported.
Hope it helps,
Ryan
Bifrost QA at Autodesk