Anyone dependent on any plug-in/bridge software that runs inside CorelDRAW, Adobe Illustrator, Adobe Photoshop or any other program like that strongly resist the urge to immediately jump on any upgrades to the latest versions. All too often the latest versions will "break" many plug-ins. And that forces you to buy upgrades to the newer, more compatible plug-ins when they are released.
I would contact someone at Corel and ask if it is possible to reinstall X6 rather than X7. I don't understand why Corel would force any subscription based users to install X7. By comparison Adobe allows Creative Cloud customers to run CS6 applications even though the CC applications have been out for several months now (and Adobe is still selling the CS6 perpetual license software). You could even run Illustrator CS6 and Illustrator CC on the same machine. A couple CS6 apps (Fireworks and Encore) aren't getting any further upgrades. I think the CS6 applications that have newer versions will be removed from Creative Cloud downloads sometime in June or July.
One could get away with using an old version of CorelDRAW, such as version X3, as long as old computers and old operating systems lasted forever. Unfortunately they don't. At some point everybody is going to be forced to upgrade.
I had to move from version X5 to version X6 when I bought my latest work computer a little over a year ago. CorelDRAW X5 would not install under Windows 8.
We still have a few older Windows XP based machines in our shop doing some specialized duties, like running a vinyl cutter. I had to do a "factory restore" to one of these old PCs just recently, just days after the XP death date earlier this month. When I ran Windows update to download the existing service packs, patches, etc. none of them were there. The page just errors out. Microsoft apparently removed all the downloadable files of XP SP1, SP2, SP3 and all of the security patches. None of them automatically download in the background either. That surprised me. I knew Microsoft wasn't going to release any new security or bug fix updates for Windows XP. But I didn't think they would remove all the already existing patches. I had to install an older version of Illustrator on that machine, CS2, because the CS3 and CS4 versions wouldn't install without one of the XP service pack updates.
It's easy to understand why Microsoft killed support for XP. They're a business after all, not a charity, and they absolutely are not making any money at all from that 12 year old OS. It's in their interests to convince people to upgrade.
OTOH, I think it's a bad move for them to remove the existing security and bug fix patches for XP from their servers. Some technology experts say millions of people are just going to keep using Win XP based PCs until they finally break and can no longer be repaired. If anyone does a clean install of Windows XP that PC will be permanently reverted back to whatever version of XP was on that disc, security holes, bugs and all. A lot of those non-supported XP boxes could end up being infected zombie PCs, working in bot armies and dragging down Internet performance.
I've seen others suggest Microsoft should "open source" XP. I don't think Microsoft would ever want to do that. Again, they're a business after all.