After some more in-depth search on the Internet I've found out that it was actually the Electrum Personal Server that needed to be rescanned.

After this has been done, it works as it should.

Thanks for all the replies!

Hi,

I've installed electrum together with EPS and the Trezor HW wallet.
When I click receive it gives me an address that was already used before I've started to use Electrum.
When I look in the addresses tab, I see that the first 8 address are already used and spent.

How can I skip these 8 addressed and get the first really unused address from Electrum?