There isn't any thrifting downtown Windsor. Downtown Windsor is strip clubs, bars, coffee houses, hotels, bingo parlors & the Casino.
There are 2 Value Villages (near Tecumseh Mall, Walker), a Salvation Army (Walker Rd), an antique mall at Moy & Ottawa (kinda sucks but you can find gems sometimes), but there's other shops in the area (thrifts, antiques, pawn, a vintage shop), Bibles for Missions, St. Vincent de Paul on Chilver. There are some vintagey shops near Chilver (somewhere), but they never looked to exciting. There is also a shop that has been there forever - Rosa's, or something, forget where that one is, but I am thinking Wyandotte. Never been. There's another one in South Windsor, I have no clue where it is, never been there, it's too out of the way.
The thrift stores are basically spread out all over the city.
If you are using Google, the Value Village on Dougall closed down a few years ago.
The Value Village shops are basically the place to go, nothing else compares in Windsor unfortunately.
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I misread about the women's clothing, but I'm not going to erase everything, lol.
Go to the Value Village stores. There other thrifts do not carry much quality clothing. You might get lucky at the Salvation Army. There is a cheap clothing store on Ottawa. I have never looked at the women's clothing.