I have downloaded the Belgium AIP on my pc and tablet (--> all plates are Downloaded)
Now i just see 8 aerodromes. EBAW, EBBR, EBCI, EBGB, EBKT, EBLG, ELLX and ABOS.
Not the other aerodromes, e.g. Spa, EBSP.
When i click on the Spa aerodrome on my pc, it says: There are no plates available for this specified airfield.

The Belgium AIP is free, so why can't i see the other plates?

Danny,

except for the main airfields, I don't see any graphic charts for say Saint Hubert or others, just textual info.

Sorry you are right.
I was just looking at SPA, EBSP, because i was there and could not load the VAC.
It has a Visual Approach Chart in the AIP ;-) That's probably the only one from the smaller airfields.
I hope SD can use this chart as VAC.