Okay in that case you're going to have to edit the project files... So:
Make a backup of your project, then open
<yourprojectname>.yyp
inside a code editor (or even Notepad). Now search for each of the missing views, checking the "
6efe6<long string of hexadecimals>
" values. You'll likely find something like:
Code:
{
"Key": "6efe6<long string of hexadecimals>",
"Value": {
"id": "1c18f<another long string of hexadecimals>",
"resourcePath": "views\\6efe6<long string of hexadecimals>.yy",
"resourceType": "GMFolder"
}
},
Now you can remove this from the file, but:
- Make sure you have a backup first! I know I mentioned this already but it's important!
- When editing, pay attention to the comma at the end, and ensure the commas are all correct after removal
- verify the JSON is still valid in the file after deleting the entries and saving using any webtool.
After this, you can open your project and you should get no errors. Note though that things like this means that you may have deleted a whole view from your project's resource tree, so have good look at all your assets and groups, to see if everything is still there and well organized.