Hi smartin,
the upgrade to the latest X.org version is indeed present in version 4.3. If upgrading to version 4.3 was not enough to solve the Evolution crashes, they are likely to be the same issue described in https://www.nomachine.com/TR10L04590. The fix will be included in the upcoming update.
If you are willing to test a patch for that problem, please contact us at forum[at]nomachine[dot]com.