Using HDM 15 version 10.1.25.710 Suite. Since the latest program update every time I delete an existing archive and select to also delete the archive files, the deletion process seems to proceed as expected; the archive is no longer listed in the database and the stored files have disappeared from my dedicated back-up drive. However, I always receive the following two error messages. The second message is especially concerning since it seems to imply that an archive created in this latest version cannot be read/opened/supported by that same version! I have never yet needed to use a back-up to restore my system but I wonder whether, if I did, I would receive the same message and hence experience problems. Later this year I hope to migrate my main system disk and OS to SDD and am expecting to use HDM15 to effect this change. On the basis of the above messages, is that likely to prove "difficult" or even "impossible"? Thank you for any advice.