My name is Ashish Aggarwal and I am the Technical Support Manager for Mimio. Please email me directly at [email protected] so I can reply with proper troubleshooting steps.
My developers just told me that there is an open bug to fix this issue. So even if you uncheck the box you will still be notified of updates. This will be fixed in the next release of MimioStudio.
In order to disable the Mimio update check, open up MimioStudio Notebook then click on the Tools Header -> Settings -> Under MimioStudio Settings select Software Update and uncheck the box "Notify me when updates are available" and click OK.