If your WM Keeper is not requesting a new activation code, you can do the following:

If you have a formal passport or higher, go to this webpage https://passport.wmtransfer.com/ and click «Change personal information». 

If WM software requests activation when you cannot access your WM-ID registered e-mail, then the situation is more complicated. 

First, try to recover access to your e-mail account, if possible. Even if the automated code delivery didn’t work for you, we can e-mail you your new code personally upon request.  

If you cannot restore your access to e-mail, then send us a message from any other e-mail address to support@wmtransfer.com.

In your e-mail include the following information:

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1) Why you are writing, e.g.: «I lost my WM registered e-mail account login/password. Here are the details of my WM registration: ...» (Mandatory).
2) Your WMID (Mandatory).
3) Last time you signed in to WM (The best you remember).
4) IP-addresses and ISP you used.
5) Your passport information (if you used them on the verification center website).
6) Your old activation codes.
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You will receive a new activation code and a reminder to change your e-mail address in the software settings, provided you submit sufficient information. However, be prepared for additional questions about your WebMoney registration. For example, you may be asked to send a scanned copy of your passport.

If you submit insufficient information, you maybe be asked to verify your WMID ownership according to regain control of your WM-ID.

See also:
When should I request an activation code?