HEVC problem Adobe Elements

If we want to convert media, .mov from Iphone we keep getting this message:

We get the message:

You must configure your system to import HEVC or HEIF media. Click learn more to learn how to import these formats.

What we did:
We followed the steps for installing the HEVC video extension. We also deleted the Cash. 
Booted computer several times and tried several times. The same message keeps coming up every time. 
Who has the solution?

We use the link below:
https://helpx.adobe.com/nl/premiere-elements/using/hevc-decoding-on-windows.html