App didnt function. Provided details to support. This was the reply from Menelaos Vergis:
Unfortunately I haven’t found the reason behind this yet.
I suspect that the large amount of SKU caused a memory problem.
You see I have to download every SKU to map them even if it’s just a one line CSV.
I am sorry I let you down but I will not been able to serve you well because of the large amount of SKU
App didn't function. No support documents available within the app nor an option for live support (just an email address). Would expect more for $28/month. Uninstalled immediately.