Lamnia ‑ SKU Generator

It only allows you to select your first 250 items. Once you generate their SKUS, they continue to pop up again without giving you the opportunity to select anything else from your store. The description says you can add up to 10,000 SKUS but there was no option to. Would have loved this app if it weren't for that flaw.

It seems that this app can't see all my active products.
I've selected all the products it showed, 50 at a time, (since there is a limit on how many products you can do at a time) but still half of my items are without SKU numbers after I went through the entire list they provided me.
A "only show products without sku" option would also work great, or even showing collections.
Hope you can fix this issue, because I like your app