TOS+ 64 bits is created using the 32 bits version, then removing the reference to Common Controls.
So installing the 32 bits version of Excel allows you to run all he previous controls - some of which have not been created (by Microsoft) for the 64 bits version.
Usually, the 64 bits version is useful for HUGE files! Even Microsoft advises normal people to use the 32 bits version:
Check this out Choose the 32-bit or 64-bit version of OfficeIn most cases, install the 32-bit version of Microsoft Office. We recommend the 32-bit version of Office, because it helps prevent compatibility issues with most other applications, especially third-party add-ins.
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