How Did This Happen?
Creative Cloud delivers feature-bearing updates on a regular basis - usually every 3 months.
But, many IT departments only have the bandwidth to update school lab software once or twice a year, during the slower times at the school. Let's face it, you would be very frustrated to lose access to your school lab just so software could be updated.
So, these updates are typically performed over the summer, and possibly during a winter break, when lab demand is not as high.
But you, esteemed power user of Adobe tools, you are on the cutting edge. You're hip, you're happening, you're whatever way you spell "cool" these days.
And on your personal computer, you're hitting that Update button the minute you see it, so you have the latest and greatest versions of everything.
Which is cool (kewl? kule? - I dunno), but it also creates the risk of file incompatibility when you move to a machine with an older software version.
How Do I Fix It?
The good news is that most Adobe software offers some form of back-saving a file to an older version, so if you know that your lab is running an older version, you could make sure to save to an older, more compatible file version before heading to class.
Check out the article below, from Pro Design Tools.
But that doesn't help if you didn't know the lab was running an older version, your computer is at home and all you have is the file.
Go Back in Time (sorta)
The best and easiest way is to fix this problem is to ensure it never happens. Make sure you are running the same version of Adobe software on YOUR computer, as is running in the school lab.
How, you ask?
Step one is to find out what version of Creative Cloud applications are running in the lab. You can check for yourself (see below) or ask your instructor or your friendly IT department.
Did you know, you can have multiple versions of Adobe software installed on your computer at the same time? Yes, you can, all the way back to the dark ages of Creative Suite 6 (CS6).
And, it's - like - totally legal, dude...
By following the instructions below, you can be more productive and creative, and less frustrated or stressed out.
There's nothing wrong with being cutting edge. But consider this: if cutting edge = bleeding edge, knowing your environment means you won't need bandages.