Lyx 2.4 beta3

[Murat Yildizoglu]

Dear friends,
I have upgraded from beta2 to beta3 today and I have the impression that I am meeting problems: a document I was able to compile with beta3 gives strange errors.
Before bothering you with these errors and me by preparing a small example, I would like to try to compile my document with beta2. Can I downgrade? Is beta2 compatible with the document format of beta3? The preferences are compatible too (but this is not a problem because I have zipped my old preferences folder before installing beta3)?
Thank you for your help.
Best regards,

Murart