Why an account does not cover this
An Adullam Tools account is optional, and what it stores stops at the company profile, logo and invoice number register. Anything identifying an employee is deliberately left out: salary figures, display names, PAN, UAN, ESIC and bank account numbers never leave your browser, and the server has no field to put them in.
There is a price for that. The details you save so you can reproduce the same payslip next month cannot leave that browser. Return the work laptop, clear the cache, or continue on a home machine, and you start from an empty form.
This page closes that gap. Because employee data is kept off the server by design, a file is the only way to move it between devices.