Error opening file for writing:

C:\Program Files (x86)\BYOND\bin\dreamseeker.exe

Click to abort yada yada, doesn't matter.

Not sure why this popped up and looking in my folder, dreamseeker.exe just doesn't exist anymore. I'm on the most recent Byond version and this had worked fine before I updated the other day, and was able to log into games less than a week ago. I recently rebooted my PC, Avast had updated, I attempted to log in, Avast had a hissy fit, and now I can no longer do anything with DreamSeeker. I've made specific exceptions for this inside of Avast, but it still fails to write. I've also ran as admin to reinstall, same problem. I've also uninstalled and reinstalled and ran as admin, which also did not work. I cannot find the issue in the eventlog viewer and I'm on the most up to date Win10.