Search For and Relink Offline Files In Reaper

This video shows how to relink those offline files that have been changed or moved after being imported into Reaper.
Thanks to dwally89 for this program restart tip!
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What's a DAW (Reaper)?
Using your current computer and no other software, you can import any audio and MIDI, synthesize, sample, compose, arrange, edit, mix, and master songs or any other audio projects.
If you add a hardware audio interface of your choice (AD/DA: analog-to-digital/digital-to-analog) and a microphone, you have a complete recording studio, suitable for recording anything from a soloist to a band to an orchestra (even if the orchestra is just you).
Nondestructive multi-track recording means that you can record and layer take after take, correcting, editing, revisiting, and tweaking to your heart's content.
There are inexpensive audio interfaces designed just to plug guitars in to, and there are very fancy audio interfaces designed to convert many simultaneous line and microphone inputs.
REAPER converts your computer into the full power of any top-of-the-line recording studio. Minus, of course, a room full of shockingly expensive converters, microphones, amplifiers, and, well, talent.
If you are a top-of-the-line recording studio interested in REAPER, this part of the discussion has probably insulted your intelligence. So we'll just say that unlike some other DAWs, REAPER will support almost any existing audio interface, even interfaces manufactured by companies whose software does not allow you to use any other hardware interface.
Refugees Welcome
If you currently use another DAW, you might be reading this because you're contemplating shelling out $150 for the next overhyped version that doesn't address any of the bugs you've been complaining about for five years while adding a bunch of features you couldn't care less about. What does REAPER have to offer you?
For starters, REAPER is coded by a small group of dedicated engineers, not multiple software units under the central command of product marketing. That means REAPER is lean, efficient, and stable. REAPER starts up and is ready to record in seconds, balances processing loads intelligently across multicore systems, and doesn't fall over when you start to tax it. That means you spend more time recording and editing, instead of staring at the startup splash screen.
REAPER also gives you two major version updates with your license. And we don't parcel them out once every year or so, either: REAPER is famous for its fast, frequent, and most importantly, stable upgrades. If you had bought REAPER 2.0, you would have received over 100 free upgrades, all the way to the end of the 3.xx version series, and the application you had at the end of the license period would have had far more depth and power than the one you started out with.
If you think there's some feature in your current DAW that you can't live without, we hope you'll take two minutes to download and try out the evaluation version of REAPER to see if it's in there. Dynamic beat slicing, multichannel audio support, intelligent automation thinning, flexible multiple MIDI hardware device and sysex support, fast controller-to-plugin mapping - REAPER's feature set is mature, comprehensive, and powerful.
Freedom and Control
REAPER is designed to let you work quickly and creatively, without imposing any artificial limits on what you can do. REAPER doesn't have track types, busses, tools, or offline processing. If you want to create a drum bus, simply add a track above the drum tracks and press the folder button - the drums will automatically send to the folder, Once you get the drum levels and FX tweaked right where you want them, you can record the folder's output to non-destructively freeze the drums and move on.
Any track can be a bus, and any track channel can be sent anywhere else. Sends are are breeze: just drag from one track to another. Sidechaining is a breeze: drag a send from the source to the target, select the plug-in knob you want to sidechain, and press a button.
Because REAPER doesn't have track types, you can use an audio gate to write MIDI triggers right on the same track. Or, render a virtual instrument from MIDI to audio as a new take. You can insert MIDI track controls at any point in the signal chain, to control MIDI pan (or anything else) both upstream and downstream of a MIDI plugin.
Every item has handles for fades, snap points, volume, per-take FX, and more, so you can work intuitively without constantly switching tools or keeping track of what mode the mouse is in.
With Free Item Positioning, you can visually arrange any number of media items vertically within a single track to control how the items crossfade and mix together. All processing is non-destructive, so once you have the perfect arrangement, glue and lock the items until you're ready to tweak some more.