upgrade 2.5.2 to 2.6.0 via clean install. config compatible?

[ZlyddeN]

I have working 2.5.2 installed on a bare metal PC. It do not want upgrade from web interface - some errors.
So I have questions:

1. it is a good solution making clean install 2.6.0 and recovering config from 2.5.2 ?
2. how I can make backup full disk image from installed pfSense? CloneZilla helps me?
3. CRL-EXPRIRED is fixed in version 2.6.0 ? Or I must do some patching magic?

PS
sorry for poor english

[stephenw10]

You can restore a 2.5.2 config into 2.6.

The link CRL bug (https://redmine.pfsense.org/issues/13424) is fixed in 2.7 but the patch is part of the System patched recommended list in 2.6. So if you're hitting that you can simply click to apply it.

Steve