I have had the same issue for a few days now, and reinstalling Opera does not fix the issue
I had some issues with this early v47 as above on my Win7 Pro 32-bit system, but these were resolved once updating to v47.0.2631.55. Would suggest anyone still operating Opera v46 on windows7, updates to the current v47 Stable.
Unfortunately, I am experiencing the issue on v47.0.2631.55 as well.