You should install the 8.5 version only if your reports are using an old data source that is not compatible with later versions of Crystal (such as Oracle versions below Oracle 7.3.4).If you are using Crystal 10, both the 9 as well as XI versions of VC will run your reports (just as Crystal 9 can run Crystal 10 reports).The parameter dialogs in version 9 are the same style as in Crystal 10, and some users don't like the parameter dialog style in XI R2. Make sure the file is placed on the LOCAL hard drive (not a CD or a mapped drive).You can install more than one version on the same machine and compare. Installation (.msi) files have self-repair and on-demand installation (for other users) functionality. In post-XP Windows versions, the application folder (e.g., c:\Program Files (x86)\...) is write-protected by default.
This patching mechanism is very fast since the patches are typically very small (contain only file changes). To delete a report from the grid (but not from the hard drive) right-click a row and select ‘Delete Row’ from the popup menu.
(this can lead to odd behaviors whereby saved settings are not available to other users or scheduled processing).
You can see an explanation of this at: Log/posts/5584
New features degrade gracefully and the report runs as if it was a Crystal XI R2 report.
Note: You can support new features by delegating exporting/bursting to Data Link Viewer 2011.