This is what happens when I try to update RankMath pro:
Update failed: The package could not be installed. PCLZIP_ERR_BAD_FORMAT (-10) : Unable to find End of Central Dir Record signature

Hello,
Thank you for contacting Rank Math
You asked a few questions and I’ll try to answer them as clearly as possible.
1. You can use your Rank Math Pro account on as many personal websites as you want. There is no limit to how many sites you can optimize with Rank Math Pro. But if you need to use Rank Math on a client’s site – you’ll need a Business or Agency plan.
2. You mentioned that you don’t see your purchases or subscriptions in your rankmath.com account. This might be because you have more than one account and you’re using the wrong one to log in. This specific account you used to open this ticket is a Free Rank Math account, please check the email address that you used to buy Rank Math Pro and make sure that’s the same one you use to log in to rankmath.com. If you forgot your password, you can reset it.
3. You also reported an error when trying to update Rank Math Pro. This error is caused by connecting to a free account instead of a pro account. To fix this, you need to disconnect from the free account and reconnect to the pro account.
I hope this helps you resolve the issues. If you have any other questions or concerns, please let me know and I’ll be happy to assist you further.
Thank you for choosing Rank Math.
Hello again,
Okay, I tried to login to the email that was on my invoice.
I am thinking when I installed the plugin on the first domain and I chose Connect, I probably created an account with another email or with google.
I guess I have to figure it out.
Hello,
We were able to locate your purchased subscription under the email address: Please check the sensitive data section.
Do you want us to merge three of your accounts?
So that you can operate all of your websites under a single Rank Math account.
If so, please share the preferred email address on which you’d like to use your account.
The issue should be fixed after that.
Looking forward to hearing back from you.
Thank you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.