You are facing a compatibility issue between SketchUp files created on a 32-bit processor and your new 64-bit system. Here’s a detailed overview based on available resources regarding this situation.

Firstly, it's important to note that SketchUp has evolved to optimize its software exclusively for 64-bit operating systems. The latest versions of SketchUp are no longer available in a 32-bit version for both Windows and macOS (source: SketchUp Hardware and Software Requirements). This indicates that if your old SketchUp files were created using a 32-bit version of the software, they may not open directly in the newer 64-bit versions.

While the 64-bit operating system can run software designed for 32-bit systems, there are limitations when it comes to SketchUp. Specifically, SketchUp does not allow for an “emulation” that can bridge this gap effectively for older file versions (source: Who said SketchUp doesn't need to be 64 bit?).

If you want to access your old files, consider the following options:

1. Install a Virtual Machine: If you can acquire a copy of the older 32-bit version of SketchUp, setting it up on a virtual machine running a compatible operating system may allow you to open and convert your old files before moving them to the 64-bit version.

2. Export to Compatible Format: If you have access to another computer with a 32-bit processor, you may open your old files there and save or export them in a way that can be opened by the 64-bit version later.

3. Check for Updated Versions: Sometimes newer versions have increased compatibility features or tools for converting older formats. Keeping an eye on updates from SketchUp can provide new possibilities for file access.

4. Forum Support: Engaging with the SketchUp community forums (e.g., Determining 32 or 64 bit compatibility) might yield advice from users who encountered similar issues.

Overall, the most effective route might be accessing the older 32-bit version of SketchUp temporarily to manage your files, as support for 32-bit systems has been phased out by SketchUp.

Sources

Sketchup Viewer Compatible with 32 bit os running with 64 bit cpu?SketchUp Hardware and Software RequirementsDetermining 32 or 64 bit compatibility - SketchUp CommunityConvert 64-bit files on a 32-bit tablet? - SketchUp CommunityExploring the 32-Bit Version of SketchUp Pro 2014 - CoohomWho said SketchUp doesn't need to be 64 bit? - sketchucationSketchUp Hardware and Software Requirements :

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