Can I reverse / restore remittance advices after a reindex?

Is it possible to view supplier remittance advices after we have performed a reindex? We were struggling with the program hanging every time we needed to print a remittance, so I went searching for a fix and found the reindex process. Unfortunately I didn't realise exactly what this process did, and now we can't view our remittances from the end of April payment run, nor any from the past several years (for some reasons 2016 and 2017 stayed!). Is it possible to restore the indexed files in any way? We do have daily backup files so I'm hoping if we need any we can restore a backup from the day before.