I have a fixed version of this extension. Download opera_google_keep_fixed.zip, extract it, goto the URL opera://extensions, turn on developer mode, click "load unpacked" and point it to the folder you extracted (specifically the "0.1.0_0" folder that manifest.json is in).
All my fix does is update the URLs in lib/common.js.
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< var flag1 = url.indexOf("keep.google.com/keep/#home") != -1;
< var flag2 = url.indexOf("keep.google.com/keep/#reminders") != -1;
< var flag3 = url.indexOf("keep.google.com/keep/#archive") != -1;
< var flag4 = url.indexOf("keep.google.com/keep/#delete") != -1;
---
> var flag1 = url.indexOf("keep.google.com/#home") != -1;
> var flag2 = url.indexOf("keep.google.com/#reminders") != -1;
> var flag3 = url.indexOf("keep.google.com/#archive") != -1;
> var flag4 = url.indexOf("keep.google.com/#delete") != -1;
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< storage.write('google-keep-url', "https://keep.google.com/keep/#home");
---
> storage.write('google-keep-url', "https://keep.google.com/#home");
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< storage.write("google-keep-url", "https://keep.google.com/keep");
---
> storage.write("google-keep-url", "https://keep.google.com/");
(It also gets rid of the update stuff in manifest.json since you don't want it to update to a version without the fix.)
