Version 8.0.7 Windows 10.
After I installed the new version I gott the error "Can’t open the file …ZIP. (Error 3: It’s not possible to find the path.)
It’s not good because you get worried about lose your work.
How to fix it?
This is a project backup zip file. As far as I know KiCAD won’t open it. You need to unpack it manually to a folder and then open in KiCAD.
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Actually more than likely the automatic backup function is blowing up here due to the 255 path length on windows
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So you think I have to long file name?
The interesting is that I have the same name length, (it’s the same project I working on) as before, so I don’t think so, if not the update is bad. I have experienc with that before 
Why now? I never needed to do this before. Is this new version bad? I have that problem before and it says that it can’t be found, nothing about unpack!
I forgot to say, the file don’t exist in the folder. Everything is strange!?
Not long filename, long file path. Try moving your project to a folder directly under c: or d: and see if that solves the issue.
Again, why now after update!? No problems earlier.
OK I’m going too try thath even it feels strange after a simple upgrade.
I don’t know, but maybe something has changed in how KiCad backups projects…
Thank you for your feedback 
No one who know too solve this irritating problem?
Hello 
Did you try with a shorter file path?
It seems extremely long…
Have you tried copying the zip to somewhere like D:/tmp
99.99% certain this is the file path character limit (like others have stated) as that entire path is obnoxiously long. So please try because this will help identify what changed if this was only due to a Kicad version bump (I don’t think so… It will be coincidence).
Either Kicad didn’t enable long-path support for this build (it’s opt-in for windows 10) or it’s is a coincidence on your side
You should FORCE long-path support universally on your machine anyway…
–edit–
I thought I had commented on such a thing before…
As I wrote earlier this project, with the long filename was working without any problems erlier.
Open Preferences, turn off backups
I can’t comment why it appeared to be working before, but it is clearly hitting the Windows limitation of 255 characters for path lengths. (Unless you set a registry key in windows to enable “long path mode”)
Need to go review why we make the backup files so verbosely named thoguh
There is no ZIP-file in the map. Where should it be?
That’s nice I’m going to try this.
Strange if Windows registry have changed. Don’t have this problem in my other projects, SolidWorks and so on…
Where can I find the Registry key for "Unless you set a registry key in windows to enable “long path mode?
Thanks 
Here ya go.
KiCad manifests longPathAware, but the registry key is required (along with restart after setting it) for Windows to allow going past the 260 char-limit.
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Yes and where can I find the key?
So Kicad is only 32 bit?
That page has the key.
KiCad is 64-bit.
The 255 path limit is a Microsoft struggling to break compatibility with Windows 95 thing. They want to, hence they added the registry key in Windows 10, but they are terrified to make it default still.
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Win32 doesn’t mean it’s 32bit, its Microsoft’s main API
The alternative, UWP didn’t catch on as it meant accepting the walled garden