Welcome to the fourms! What I would recommend is to use the web based code that is https://codeiq.vex.com/
this has worked for all three years of my VEX IQ career and should work and be up to date. The download is not as reliable and can sometimes have a mind of its own and mess things up (past experience). That is why you should use the website based coding. There is no difference from the download and the website, other than than the website needing internet, which you should already have if you are downloading something.
Only Chrome Apps, which are only applicable for Chromebooks, are being discontinued by Google. You will no longer be able to use VEXcode IQ as a Chrome App on Chromebooks starting January, thus you MUST use the web-based version on Chromebooks.