Forums › Help & support › Changed OS drive and upgraded Axcypt and now most files won't decrypt › Reply To: Changed OS drive and upgraded Axcypt and now most files won't decrypt
First of all – if you have a backup, you have a backup. If you could open them before, you can open them now (at least by definition with the same version you hade before). AxCrypt 2 does open all AxCrypt 1 files – we do not have an reports to the contrary. If you can’t open them now, you couldn’t opent them before either – simply because you’re not using the right password.
What may confuse you when you revert back to AxCrypt 1 is that files that you have successfully opened with AxCrypt 2 will have been re-encrypted with the AxCrypt 2 updated file format, and with the password used to sign in to AxCrypt 2 (which is not necessarily the same as the password you originally used for AxCrypt 1).
This upgrade of files is probably the reason you’re now getting “the version difference is too large”, although the intention of the old code is actually that you should be getting a message stating “File saved in newer, unsupported, version. Please upgrade.”. However, it’s really hard to be future compatible, so it’s possible the old code flags the newer format as you experience.
I think that if you examine the “modified” date of the files in your backup, and try to open them with your known password using the old version (or the new, I suggest the old just so you can have increased confidence) I think you’ll find that the problematic files occur in date-time clusters. The most probable reason is that you mistyped the password (or used a different one than what you think now) when you encrypted these files. The whole “sign in” system / single password with AxCrypt 2 is designed to minimize the risk of this happening, since we know it does with AxCrypt 1 sometimes.
Rest assured, if you have the original password, you can open the files. Especially the ones from the backup and using the original software, since then we’re removing even the theoretical possibility that the upgrade has anything to do with it.