Limits a post to a single category by changing the checkboxes into radio buttons. Simple.
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Advanced Contact form 7 DB
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WP iSell Photo
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Very Simple Google Maps
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Image Compositions
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SimplyBook.me – Booking and reservations calendar
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PJ News Ticker
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INRDeals – All in One Auto Affiliate Linker
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WP User Avatars
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WP Discourse
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Paytium: Mollie payment forms & donations
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Bitcoin Payments – Blockonomics
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YouTube Subscriber
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ETH Redirect to Latest Post
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Force Lowercase URLs
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Affiliate Coupons – Coupon Display Manager – Excellent Tool for Affiliate Marketers
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Zedna WP Image Lazy Load
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Remove Fields
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Counter Box – Add Countdowns, Timers & Dynamic Counters to WordPress
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NHS Blocks
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Author Spotlight (Widget)