Hi @satisfied_wanderlustcd39,
Three months of daily reinstalls and losing control of which Illustrator opens your files each time you double-click is a real workflow problem. Here's what's going on.
This isn't normal Creative Cloud auto-update behavior. Auto-update only ever moves an app forward to a newer version; it never reinstalls an older version over a newer one. For version 28.3 to keep coming back every day after you remove it, something on your machine has to be actively redeploying it on a recurring basis, that doesn't happen on its own.
This kind of pattern usually shows up when a machine is IT-managed, for example, if your company's IT team pushes software through a management tool or policy that still assigns the older version to your device. That would explain both the daily reinstall and why it keeps resetting your default app for .ai/.eps files, since each reinstall re-registers itself as the default handler for those file types.
A couple of questions to help narrow this down:
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Is your machine managed by your company's IT department (i.e., can you install/uninstall software freely, or does IT control what's installed)?
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Does your IT team use any kind of remote software deployment or device management tool on your laptop?
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Do you know if your Illustrator license was assigned to you through an Admin Console seat managed by your company, or is it tied directly to your own Adobe ID?
In the meantime, here's how to fix the file-association issue each time it happens, per Adobe's file-association troubleshooting article:
"When multiple versions of Photoshop, Illustrator, or any other Creative Cloud applications are installed on a computer, uninstalling the earlier versions after installing the new versions breaks file type associations for the new versions."
Windows steps: Control Panel > Default Programs > Associate a File Type > select .ai > Change Program > browse to your Illustrator 30.8.2 install path > ensure "Always use the selected program" is checked. Repeat for .eps.
This will need to be redone each time 28.3 reinstalls until we find and stop the cause of the reinstall.
Thanks,
Tariq