see below some information
Upgrading from previous QlikView versions
QlikView Desktop upgrade
To upgrade, previous versions of QlikView first should be uninstalled. Once this has been done, the installation of QlikView Desktop should run seamlessly and use the settings from the earlier version.
QlikView Server upgrade
From QlikView 8
The QlikView Publisher database from a QlikView 8.5 cannot be used for QlikView 10, unless the upgrade tool delivered with QlikView 9 is used.
From QlikView 9
When having IIS and updating from Version 9 to Version 10 the QlikView virtual fol-ders (QlikView, QVAnalyzer, QVAjaxZfc, QVClients, QvPlugin, QVJava and QVPlugin) must either be manually deleted after un-installation or changed to point to the new folders (QlikView, QlikViewDesktop, QVAjaxZfc, QvClients and QvPlugin) after the upgrade is done.
If there is no Publisher license (only a QlikView Server license) and reload tasks have been set up, a manual step is required.
1. After installation, start all QlikView services.
2. Go to the systems tab and select the QlikView Server.
3. Go to the General tab for the QlikView Server
4. Under the heading "Migrate Schedules" you will find a button to migrate the schedules. Note that this will only appear if you have any tasks to migrate and if the Management Service has connection to the QlikView Distribution Service.
To avoid that the uninstall of version 9 removes the .config files, please make a back-up copy of the ones you have modified manually. The most common one is QlikView Distribution Service.exe.config.
After an upgrade, the supervision accounts needs to be added in the QEMC again.
When upgrading from version 9 to version 10 you should restart the [physical] server after the upgrade.
Make sure that you delete temporary Internet files on the computer where you run QEMC/QMC after the upgrade.
There are some different scenarios here. If you don't have reload tasks (not the Publisher ones but the Server ones), or if you don't mind creating them again, or you don't have Document CALs, you can uninstall the old version and install the new one, placing the QVW files in the root folder as specified in the QlikView Enterprise Management Console and that will work fine.
QVW files generated with QlikView 8 should work just fine with version 10. You don't need a Server to clarify this extent, just the Desktop version. Note that some macros might not work because they are now deprecated or obsolete. Charts should show all right.
Hope that helps.