Hi again Ian,
sorry to interrupt here but currently it´s not 100% clear what you expect, what you want … So please, can you specify your question now - we have lost your way here, sorry …
I have identified now different things here in this posting - so what is the right question now?
you want delete only the backups in the FMS Data Manager?
you have an issue in XP11, that you see an older/outdated version but you want the current one?
you want to use an outdated XP11 version, when yes which cycle and which XP version?
you want to restore an previous backed up XP dataset from the FMS Data Manager?
Thank you very much,
Richard
PS: and sorry for the third face here in your posting … but we are working in a team, where we discuss such issues to solve it fast and efficient - therefore sorry for the questions again
I was trying to restore a previous backed up XP dataset from the FMS Data Manager.
I wanted to go from airac 2014 to 2013, and as I saw that the FMS Data Manager had a restore feature, and that the list of backups of airacs in the FMS Data Manager goes back to the year 2018, I thought I would give that feature a try instead of manually copying my 2013 Custom Data folder to XP.
If you read back to earlier posts with Malte, you will see that when I tried to do the restore, it didn’t work.
As a note, I am on macOS 10.15.7, XP 11.51 (was on 11.50 when I first tried a backup).
Yes, I deleted the contents of the backup folder as Malte suggested, then with XP at 2013, I used the FMS Data Manager to download 2014. So at this point my backup folder contained the backup.idx file and 1 .bak file of 18.6MB.
I then went and tried to do a restore and had the same problem, the restore icon flashes for a microsecond, but no restore occurs.
(The backup files cannot be correct, usually I also have an 80MB+ .bak file of the same date, sounds to me like the FMS Data Manger isn’t really backing up the full airac…)
To manually reset XP’s airac I keep a copy of the Custom Data folder from previous versions and then just copy the contents into XP, giving me the previous version of airacs.
When I made a zip-file of the “Custom Data” folder (only the navdata-files and the CIFP folder - which is necessary for XP11.5x) - also get approx. 18Mb
80 Mb is far too much or you use a compression rate which is very low, no idea but the backup-file looks ok (from the size). But, to verify it - have you any possibility to upload the backup.idx file + the one *.bak file somewhere and can you provide us the link for looking deeper into the file, if the backup is ok or not?
A second request:
Rename the “Custom Data” folder to “Custom Data - backup” (or similar else), so that no “Custom Data” folder exists in your XP11.5x root. After that, try the restore again … same result?
Okay, that is what my new backup folder has, an 18.6MB file, I assume that is airac 2013.
In my old backup folder (before I deleted it, I do have a copy though) there were a bunch of 80MB+ files. For example, I would have an 18MB file with date 20201203, and an 89MB file with the same date, the names slightly different.
I tried your suggestion of renaming Custom Data so that it is as if I have no airac data, but got the same problem trying to do a restore.
I have uploaded my current backup folder to my Google drive, here is the link, hopefully it works…
… but we are working in a team, where we discuss such issues to solve it fast and efficient - therefore sorry for the questions again 
