Summary:
An error occurs when trying to access the Quick Books Integration Manager. Error: The process cannot access the file C:\Users\Owner\AppData\Local\Replicon\StandaloneStartup\5.5.11.1\qbierror.txt because it is being used by another process.

Resolution:
Delete the folders pertaining to the older versions of Quick Books Integration Manager located in the following path: C:\Users\Owner\AppData\Local\Replicon\StandaloneStartup
Access the folder of the current version of Quick Books Integration Manager under C:\Users\Owner\AppData\Local\Replicon\StandaloneStartup and delete all files except the config file. Restart the Quick Book Integration Manager and it should launch without a problem.

Note:
Do not delete the folder for the current version of Quick Books Integration Manager.