You cannot easily switch between 0.7.x and 1.0.x versions.
Bugfixes in 1.0.3
- Fix jobs hanging at 99% or 100%
- Support X-DNZB-PASSWORD header for indexers that use this
- Prevent fatal "too many connections" issue
- Show checksum errors reported by unrar
- Windows: fix coupling of NZB files to SABnzbd, when the name contains non-US-ASCII characters