Compatibility error

[nbastias]

Dear STKO team,

I have a problem with the compatibility of some .scd (attached 1 in this post) that were made in a previous version (I think 1.0.0). In the current version (3.3.0), I can not open them because it shows the following error (attached figure), how can I solve this problem? thank you in advance.

[STKO Team]

Unfortunately, it's impossible: It probably comes from a pre-release of the first STKO version that was using a different file format.
For some years we kept backward compatibility, but not anymore