Recover email list

Hello,

I hope that you can help me, it is very important.

For ymonths I had a coming soon page using your page, asking people to put their email to registrer to the database.
But few days ago I decided to connect my website to Shopify instead of WordPress.
And now I can not connect anymore to my WordPress admin and so I can not go back to your plugin and I can not import my database.

What can I do? Can you help me having my list back?
Thank you so much.
Best,