Okay....will now send back my device - will not take a TP Link switch again after this (service) experience...

As far as I know, this Subnet mask just says, that my computer is looking into 192.168.*.* If I would set it to 255.255.255.0 it would look into 192.168.0.*

@Kevin_Z I've tried the direct connection now again - Config Tool does show nothing, Default Gateway of switch is pingeable... What next?

@Kevin_Z Hi, I have the very same issue - received my switch today, wanted to upgrade the FW to Version TL-SG108Ev4_en_1.0.0_[20181120-rel40749]_up - the Unmanaged Pro Configuration Tool showed an...