Conversion Nightmare?

I've been using eWallet for many years, and during that time I've accumulated over 700 cards, many of which contain free-form fields that I've named myself, so they don't follow any default field naming convention. Sadly, eWallet doesn't have a browser extension, and they have no intension to create one. So I've been on the hunt for a pw manager with all the bells and whistles, one that works on Windows, android and has a browser extension. 

Recently, I've been trying another brand of PW Manager, which I populated with a txt file from eWallet. Unfortunately, the app I've been trying is very rigid in its importing requirement, so many of my cards won't transfer.

Question is, is 1Password flexible enough to allow the import of all my cards, including those that don't follow conventional field-naming templates?

TIA