Sure, thanks for asking! Designing the UI can indeed be quite challenging since we all think differently.
1) PLabel and SLabel stand for "Primary" and "Secondary" labels. So when you add a Part you can define a PLabel and SLabel (e.g. - Microcontroller > AVR). You can change labels in the Settings dialog and use them on Filters to help you listing Parts of given labels. I'm considering to have just on column for "Labels" that just join the PLabel and SLabel text. Would it make sense?
2) Parts should contain the "Manufacturing Part Number". All vendor-related information (SKU/vendor part number, prices) is displayed only on Projects and Orders tables/dialogs. That's because the price depends on the vendor (I call it Seller) you choose and the quantity you want to use which is Project/Order-specific. However, someone has already suggested to include the last price used/paid on a Part's info. Currently is not possible to add "custom fields" to Parts.
3) In Projects > BOM, when you click on the "+" button you should write the BOM references (e.g "R1, R2"). In order to see SKU and pricing info you need to "Assign Part" and after that you should see something like this (dummy data):
http://prntscr.com/f2nzt2. BOMER takes into account MOQ and price breaks when displaying pricing info. Also, BOM refs can be imported from a CSV file.
You can also test this by creating an Order. Go to Orders > Add new one / Add Parts, then SKU and pricing info should be automatically displayed according to your Preferred Seller. You should see something like this:
http://prnt.sc/f2ns7p4) Every table (with relevant info) is exportable to a CSV file (right-click on the table, select "Export...") which you can then edit/print on your favorite spreadsheets app.
5) Files are files you want to have associated to your Parts/Projects/Orders, such as: datasheets, CAD drawings, invoices, etc (similarly to Labels, Files have Categories - also editable through Settings dialog). You can import them from your File System or from the Web. For example, when adding a Part, click on the "+" button (Files group) and choose "web" in ComboBox. That will show you all the documents (in this case datasheets) BOMER found on the web for that part. If you want to download it to your disk, select it and BOMER will take care of that.
Hope this clears things a bit.
Documentation and more info in general about BOMER is more than planned, it's just a matter of time.
May is the month! Things will gradually show up at
bomer.co.