7.xx versions up to now (7.30) have the followig behaviour:
1)
I load some project and try to make my first export .
Export -> Video File ->
Preset: Custom
File Format -> Pencil symbol -> H265 / "High Quality / Larger Filesize" / Audio: 192 kbps
=> OK
=> Create
2)
Now lets make another encoding ...
Export -> Video File -> ...
We notice that Preset display 'Custom" , but VP didn't saved previous settings (H264 / Default Quality ).
Now if I drop down 'Custom' and choose 'Custom' again (!) .
My favourite settings will now be restored (H265 / "High Quality / Larger Filesize" / Audio: 192 kbps)
Maybe this is the reason for many people who can't make expected exports .