Smart Label Printer

I have been very happy with my other Seiko label printer for several years. But the software I've been using is now incompatible with El Capitan and unusable. I has spent a couple of hours trying to figure out how my Mac's settings had gone wrong, only to find it's Seiko who abandoned me and my Mac. The short instruction sheet included in the box refers repeatedly to the old Mac software which doesn't work on El Capitan. So I foolishly bought this new model, which uses entirely rewritten software. I've had nothing but trouble since, as the software borders on incomprehensible and unusable. In addition, all my old labels are incompatible and there's no conversion method, so I've lost everything. There is a handful sample templates, but they are ugly, cluttered, and need reworking to make them useful. The online help people only have access to Windows PCs and are unable to help. They keep referring to the new software's help file, but that only shows Windows dialog boxes which bear no resemblance to what I see on my Mac screen. I tried to add a USPS barcode to a label I laboriously created, only to be told I have to build an entire database to do so. Now the software won't recognize my USB/network connected printer, which worked fine with the previous software. In addition, the online help staff's attitude is that one of unconcealed contempt for my woes. I'm quite disappointed and am shipping the printer back to Amazon. I'll just use Avery label sheets on Word; at least Avery provides plenty of easy-use templates for download.