Beyond the Pale - How do I upload a .csv or .pif file to the online vault?

I've used the desktop product for 12 years. And am now trying to move from the desktop version to the online version. I asked for help back in March. Still not resolved. To the male representative who removed my legitimate request for help, please help.

I just had to sign on to the 1 Password website using my new account secret key, password, and mail address. Do I have to do that every time for my iPad, iPhone and PC, once I transfer my High Sierra 10.13.6 vault?

I don't want to lose my desktop vault on my Mac running High Sierra 10.13.6 because it will be irreplaceable. It is running 1Password 6.8.9 and the OS is too old to run 1Password 8. If the operating system is too old to run 7 or 8, how is product going to work?

Currently 1Password syncs via WLAN with all the other Macs except the new MAC using Monterey.

There is also a PC running the desktop 4 version. I've sent in diagnostics for all.

It looks like once I load the passwords from 6.8.9 into the online vault, I'll lose those passwords. If I lose the 6.8.9 passwords in the 10.13.6 version, it looks like I will have to sign into your website I want to use a password. Is that the case? Too labor intensive.

Please help.

1Password 6
Version 6.8.9 (689001)
AgileBits Store

1Password Version: 6.8.9
Extension Version: Not Provided
OS Version: 10.13.6