A standard VIDEO should work on either version... a PROJECT file is generally not backwards compatible
Is this an outdated thread? I thought that you had resolved the play button/space bar issue.
Classically, you cannot open a project created in a later version in an earlier version. If you try, you get hit with "The project appears to be damaged, it cannot be opened." messaged. There was one rare and little known occasion when that was not the case. It involved Premiere Elements 10. So, that is not going to help us any here.
If you still have the play button/space bar issue, can you get out of the 13 project by exporting it to file which you can import into a new Premiere Elements 11 project? If need be, I can suggest the details of that if you tell me the project setting for the 13 project.
Please let us know the situation at this time.
Yes, this is an outdated thread. The space bar/play button problem has been resolved by deleting the file that you suggested.
In case someone finds this thread that we are in now and wonders about the outcome of the play button/spacebar situation, this is
the link to your other thread on the play button/spacebar matter