It is posible, but doing so may break some updates that we have made for subdirectory settings and for stand alone file manager among others, I don't recommend it.
you would need to make a copy of the
webassist/kfm/themes/webassist/
webassist/kfm/themes/webassist_v2/
folders
and the
webassist/kfm/configuration.php
webassist/kfm/initialize.php
Files, copy the updated KFM files to the webassist/kfm folder
then copy the files that where backed up back into the kfm directory.