We have a large project using the classic netadvantage controls. The old webdatechooser (10.1.20101.1011) doesnt work with the latest version of internet explorer and so we needed to upgrade. The problem is we can't use the upgrade utility to just upgrade the whole project due to the retired asp.net controls, so what we did was add the new netadvantage controls to the project and manually replace the old controls with the new ones for the most important parts of the system, leaving many still using the old ones (because its a huge job to go through them all).

So now the situation is that we have a project with some pages using new netadvantage controls (12.2.20122.2075) and the rest still on the old version (10.1.20101.1011).

I went to install netadvantage 2012 Vol 2 on a new pc, and during the install it noticed there were updates, so it downloaded them (without giving us an option to ignore the updates and continue with the existing version). So now we have the new machine installed using 12.2.20122.2107 of the controls - but the project is using 12.2.20122.2075. So now it wont compile - so i thought ok thats a bit annoying, ill just upgrade the project to use the latest version 12.2.20122.2107, but then i realised i cant do that because i still have references to the retired controls.

What am i supposed to do here?