Opera Next 24 was too slow to be usable for me. Some pages would never load. Shockwave Flash was having major difficulty too. I saw two Opera folders (23... & 24...) in Program Files, so I renamed the new one, and copied the old version number over all instances in the installation_status.xml file.
- Windows 8.0 Pro, Single-core Pentium 4, 2.8GHz, 3GB RAM using 1GB as RAMDrive (x:) for cache & temp files.
C:\Program Files (x86)\Opera Next\launcher.exe" --disk-cache-dir=x:\