free email crt stopped working, trying to collect again with error 0x80092004

My free e-mail cert stopped working after some issue with Outlook, while opening encrypted message outlook says that certificate is missing. The cert is still in IE, with private key, but I cannot export it. Older cert from previous year works well. So I tried to collect it again, but got error 0x80092004: CertEnroll::CX509Enrollment:InstallResponse: Object or property not found. 0x80092004. Using same PC and tried both browsers I use - IE and Chrome.
I found some answers in forum to revoke cert and reisue it again, but I think I will not be able to open older e-mails encrypted with revoked cert - am I right?
Thanks for help