Version 253 rejects modells created with 252?

[Niels Bruhn]

Good morning.
Yesterday, I wanted to open hydrostatics (speed/drag) of a mirrored modell and got the error message:
“access violation at adress 00817D91 in module Delfship….” :angry:
On other non-mirrored modells the program still works properly.
OK, thought to myself the installed program may be somewhat corrupted. I removed it from my PC, downloaded a new installation file (.. named with Version 252..) and reinstalled the program, which is surprisingly now 253. OK, doesn`t matter.
But now, all modells I´ve opened with the version before I got an error message
“This file was created with a later Version of Delftship and cannot be opened with this version” What the hell is that?
Can somebody explain what went wrong or what can I do to get my modells in a save haven?
best regards, Niels

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