I too have been suffering from the 'Crash on opening Saved Layout' syndrome since updating to the Release Candidate last evening.
My Reading Plan layout has the 'Logos Box' with one book (four tabs for the same book), one bible (NKJV) and explorer. Floating on the second monitor is a panel with 'Biblical Places' open which I use to improve my biblical geography.
This Layout will not open with out crashing Logos.
If I rebuild the Layout without the floating panel then it opens without problem - add back the floating panel and it crashes.
Will post logs when the developers get round to providing a simple switch to turn logging off and on.