file backup logic fixed

[nitin710]

Description

• Handles the edge case if the user decides to cancel the uninstallation of the software midway, we don't "move the files to the backup folder" and leave the application in-operational.
• see https://github.com/EmotiBit/ofxEmotiBit/pull/330/changes#r2748276016

Requirements

• None

Issues Referenced

• None

Documentation update

Link to a change in documentation (if any)

Notes for Reviewer

• Add detailed notes explaining code changes, algorithms or any other information that can help the reviewer understand the PR better.

Testing

Feature Tests (Integration tests)

• Tested by installing 1.14.7 over a 1.12.2.