I recently tried uBlock Origin and that's a good one, as well. I'm using both of them together now.
If and when you add the AdBlock Plus, make sure that you uncheck "Allow some non-intrusive advertising" under its settings, as it's pretty much useless with that checked. It deems just about all ads as non-intrusive. LOL.
And, as Old Labs intimated, no questions are dumb. They are only dumb if you don't ask them.
No. The usage tally is ongoing. Never resetting. You just choose what part to look at, whether a day, week or month, or anything in between by using the sliders and calendar dates on the top. It keeps it current to the last thirty days, saving the last thirty days for you to be able to look at, and pulls the 30th day ahead as the days go on. So, if it's the 5th of a month, it keeps the total running from the 5th of the previous month, then the 6th to the 6th, 7th to the 7th, and so on. I can look all the way back to the 12th of September right now.
Sorry, I should have let Old Labs answer you. I didn't mean to step on him/her.
That's only 10MB more in two and half hours. Not really anything to worry about.
With it being on the day option, it will show the total for whatever day you are on, from 12:00AM to the current time. If you are on "Day" tomorrow, it will show your amount from 12:00AM Thursday (tomorrow) morning to the current time tomorrow that you are looking at it. You can look at totals going from the current day to thirty days ago, or anything in between by changing day to week or month and moving the left slider to wherever you want it from the past. You can also look at a day or days from the past by moving the sliders to select just that day or days. But, at 12:00AM tonight, the Day will change from today to tomorrow, so if you looked at it at 1:35AM and it was on Day, you would only be seeing the totals from 12:00AM to 1:35AM tomorrow.
I can't remember, are you on a Gen4 plan or a daily reset plan? Did you install your Windows updates today?
Post another "All" screenshot so we can see what used the 10MB.