Is the info about the old backup set stored anywhere I can get to, or do I have to reconfigure the backup routine from scratch?
The configurations are stored in $SYNOPKG_PKGDEST/.duplicacy-web
. That didn’t change in the DSM7 package. However, Synology may have changed the value of $SYNOPKG_PKGDEST, which now seems to /Volume1/@appstore/duplicacy
instead of /volume1/homes/admin/
. If you can see files in /volume1/homes/admin/.duplicacy-web
then you can just copy them to /Volume1/@appstore/duplicacy/.duplicacy-web
.