[Bug] Auto-updater does not appear to work, causing errors

[muzikbike]

Describe the bug
When prompted to update ScreenToGif, proceeding to do so will result in an error being displayed.

To Reproduce
Steps to reproduce the behavior:

1. Open ScreenToGif
2. Finish using it and close it
3. When prompted to install updates, install
4. See error

Expected behavior
ScreenToGif would be updated.

Screenshots

Desktop (please complete the following information):

• OS: Windows 10
• Version: 2.34

Additional context
I've encountered similar issues when trying to update FileOptimizer, so there's a considerable chance it may be an issue on my end.

[NickeManarin]

The updater downloads an MSI file, then it tries to unpack the installer contents to update in portable mode.

There's two probable causes:

1. The installer downloaded may be corrupted or may be getting scanned by an AV, which would prevent the installer from being executed.
2. Your Windows Installer installation (which is necessary to read and install the MSI file) is corrupted or missing some files.

You can try enabling the portable update, but you need to unzip and replace the file manually.

[muzikbike]

I did end up downloading the version you have to actually install, since I think I was previously using the portable version, and the updater seems to be working fine so far.