Hey thanks!
I am doing this now. Just to make sure, I am installing fm9_dyna_cabs_1p08.zip right? It's almost done it looks like. So I assume this should work? Right now, I see on the FM9 that the unit verified the firmware, and is in the process of "writing to flash".
Edit: I'm assuming this was right, because when instructed to power off the FM9 and wait five seconds, it came back on with no error message, and it seems like the unit works fine.
It sounds like you're fine now. I've never heard of installing the wrong Dynacabs having a lasting impact on an FM9. Worst case you can use the emergency boot load to reinstall firmware and then install the correct Dynacab. I've been updating Fractal gear since 2011 (AxeFX 2) and I've installed new firmware many times. I've found that there are several keys things to know.
1. One of the main things that newer Fractal customers forget to do is "Read the release notes" that are included in the new firmware zip file. Always read the release notes. The release notes contain important information that may impact the firmware update process. The release notes also communicate information about how your existing presets may be impacted, as well as other stuff that's relevant and important.
2. ALWAYS back up your device before starting the update. You can backup easily using Fractal Bot. That way you are guaranteed to be able to return to where you were before the update. This is a good practice for many reasons. It takes more time, but is a great safety net if you run into unanticipated issues. Some firmware automatically updates presets, to accommodate changes that are not visible to us average users. If you elect to return to a previous firmware, and you have not backed up your presets, then you may not be able to use a preset on an older firmware. This is one of the many reasons why a current backup is your friend.
3. I install the most current version of Axe-Edit before I start upgrading the firmware. I don't know if Fractal recommends this or not, but it's worked well for me, and I've been doing this for quite a while now with zero issues.
4. After installing the latest version of Axe-Edit, I open Axe-Edit and then use Fractal Bot under the Axe-Edit tools menu. Installing the latest version of Axe-Edit (or FM9-Edit or FM3-Edit) first makes sure that you're using the recommended version of Fractal Bot for the new firmware that you want to install. Just remember, that this practice works when installing the new firmware that's released at the same time as the latest Axe-Edit. If you attempt to install older firmware then there may be compatibility issues with new versions of Axe-Edit and older firmware. Asking about this in the appropriate forum section (AxeFX-III, FM9, or FM3 as appropriate) prior to going backward to an older firmware is a good practice. It isn't unusual for new firmware to include updates that make presets incompatible with older firmware. Having backups allows recovery of older versions of presets. One additional reason why making and saving backups can be useful.
5. Make sure that you install new firmware first, before installing new Dynacab updates. Always follow the prompts on the screen of your Fractal device. If it says to reboot, then reboot (waiting the recommended 5 seconds). The reboot process resets everything by loading up current settings as defined by the new firmware.
6. You only have to update the Dynacabs if your Fractal device gives you a warning that the correct Dynacab file is not installed. This warning is only displayed after the boot process completes. If there is no message displayed after rebooting then you already have the correct Dynacab file installed and no additional action is required.
I've probably updated firmware over 100 times since 2011. I have yet to experience any issues during the update process. And, as mentioned above, if something weird happens, then I have a backup that I can use to get back to known working state. So, always backup your device before updating firmware and you're golden when the unexpected happens.