Steps to reproduce :

1) Download attached project " 123213213.zip" and open in Unity.
2) In Project tab, click on "Rewired1.0.0.89.U5" asset and press Import.
3) After importing asset, press cancel on dialog window, and Okay on the next one.
4) In Project tab, click on Rewired >> Internal >> Data >> Controllers >> and click on ControllerDataFiles.
Note : There is no data showed in Inspector tab (see attached image "noData.png").
5) In Project tab, click again on "Rewired1.0.0.89.U5" asset and press Import.
Note : Click again on ControllerDataFiles and check Inspector tab, you will notice that data is successfully imported. (see image attached "imported.png")

Expected results: Unity should import Binary data from the first time.

Actual result : Data being successfully imported after 2nd time.

Tested versions :5.2.4f1, 5.3.5f1, 5.3.5p6, 5.4.0b24