64-bit screen savers won't run if 32-bit versions were previously installed

I've run into this a few times now. If I try to install, say, the 64-bit version of the screen saver "Euphoria" (version 10.2 - http://s.sudre.free.fr/Software.html), I get the same message as if I were trying to run the older 32-bit verion (You cannot use the Euphoria screen saver ... etc).
Yet if I try to download and run a 64-bit version of a screen saver I previously did not have (e.g., "Flux," "Fireflies" from the same site), then it runs fine. On one screen saver ("Anemona" - http://uri.cat/software/Anemona/) I ran into the problem, but I managed to get it to work by altering its name before installing it, but for "Euphoria" and others this did not work. I've tried deleting the old version first, but that didn't work.
Has anyone else run into this? Does 10.6 keep track of these files on a "rejection" list so that installing newer versions can still prompt rejection?
Any suggestions? Thanks.

Probably you were seeing a conflict between a version of the screen saver in "/Library/Screen Savers" and the new on in your personal "~/Library/Screen Savers"
Best to delete a screensaver (right click context menu in screen saver preferences) before reinstalling it.

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2739501 - 2013 Method 1 or 3
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==========
Method 1
Open C:\Program Files\Microsoft Office 15\root\integration\
Delete all C2RManifest*.xml files in that folder.
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HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Microsoft Office 15 - ProfessionalRetail - en-us
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Method 2
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Select View, then Choose Details
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Select View > Sort by > Subject
Locate all .msi files that have Microsoft Office 2013 product names and uninstall them.
Use Windows-R to open a run box
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Open the %ProgramFiles%\Microsoft Office folder or %ProgramFiles(x86)%\Microsoft Office on 64-bit systems
Delete the Office15 folder.
Open the MSOCache folder on the root of the hard drive
Open the All Users folder and delete every folder that contains 0FF1CE} in the name
Open the folder %appdata%\microsoft\templates
Delete the following files Normal.dotm and Welcome to Word.dotx
Open the folder %appdata%\microsoft\document building blocks
Delete the building blocks.dotx file
Press Windows-r, type regedit and hit enter
Open the following Registry key: HKEY_CURRENT_USER\Software\Microsoft\Office\15.0
Delete the following Registry keys if you are running a 32-bit version of Windows.
HKEY_CURRENT_USER\Software\Microsoft\Office\15.0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\15.0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Delivery\SourceEngine\Downloads\*0FF1CE}-*
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\*0FF1CE*
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\Upgrade Codes\*F01FEC
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Products\*F01FEC
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ose
HKEY_CLASSES_ROOT\Installer\Features\*F01FEC
HKEY_CLASSES_ROOT\Installer\Products\*F01FEC
HKEY_CLASSES_ROOT\Installer\UpgradeCodes\*F01FEC
HKEY_CLASSES_ROOT\Installer\Win32Assemblies\*Office15*
Delete the following Registry keys if you are running a 64-bit version of Windows
HKEY_CURRENT_USER\Software\Microsoft\Office\15.0
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\15.0
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\Delivery\SourceEngine\Downloads\*0FF1CE}-*
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*0FF1CE*
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\ose
HKEY_CLASSES_ROOT\Installer\Features\*F01FEC
HKEY_CLASSES_ROOT\Installer\Products\*F01FEC
HKEY_CLASSES_ROOT\Installer\UpgradeCodes\*F01FEC
HKEY_CLASSES_ROOT\Installer\Win32Asemblies\*Office15*
On a 32-bit version of Windows, open the following Registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
On a 64-bit version of Windows, open the following Registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall
Select File > Export, type UninstallKey01 and select Save.
Under the uninstall key determine the subkey that has the following values:
Name: UninstallString
Data: file_name path\Office Setup Controller\Setup.exe path
Delete the keys that match the data and repeat the process until all keys have been processed.
====
On the other hand, the installation source also may be a factor, please try to change one and test.
https://products.office.com/en-us/download-back-up-restore-microsoft-office-products?legRedir=true&CorrelationId=9398947d-5b49-4e53-a203-0ef5ff858293
Hope it's helpful.
Regards,
George Zhao
TechNet Community Support
It's recommended to download and install
Configuration Analyzer Tool (OffCAT), which is developed by Microsoft Support teams. Once the tool is installed, you can run it at any time to scan for hundreds of known issues in Office
programs.

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