Safe mode and video driver restart (#245)

* Update troubleshooting.md

safe mode instructions

* Update files.md

safe mode instructions

* Update troubleshooting.md

video driver restart

* Incorporating reviews- files.md

* Incorporating reviews- troubleshooting.md

* Incorporating reviews- files.md

* Incorporating reviews- troubleshooting.md

src/files.md

@@ -62,9 +62,9 @@ If you have made a destructive change on one computer and have an
 undamaged copy on another computer, you may wish to start Anki without
 syncing in order to use the full sync option without first downloading
 the changes. Similarly, if you are experiencing problems with Anki, you
-might want to (or might be instructed to) disable add-ons temporarily to
-see if one might be causing the problem. You can do both of these things
-by holding down the <kbd>Shift</kbd> key while starting Anki.
+might need to (or might be instructed to) disable add-ons temporarily to
+see if one might be causing the problem. To do both of these things at the same time, you can 
+open Anki in safe mode by holding down the <kbd>Shift</kbd> key while starting Anki. Keep holding <kbd>Shift</kbd> down until the on-screen message informs you that Anki has started in safe mode.
 
 It is possible to specify a custom folder location during startup. This
 is an advanced feature that is primarily intended to be used with

src/troubleshooting.md

@@ -12,7 +12,9 @@ If the problem does not occur again, you can skip the following steps.
 
 **2. Check add-ons**
 
-Please close Anki, then start it again while holding down the shift key. If the problem goes away, that indicates an add-on is causing the problem. Remove any add-ons you don't need, and disable half of the others. If the problem continues, try the other half. Repeat
+Please close Anki, then open it in safe mode by holding down the <kbd>Shift</kbd> key while starting Anki. Keep holding <kbd>Shift</kbd> down until the on-screen message informs you that Anki has started in safe mode. 
+
+If the problem goes away, that indicates an add-on is causing the problem. Remove any add-ons you don't need, and disable half of the others. If the problem continues, try the other half. Repeat
 the process until you've figured out which add-on is causing the problem. Then please report the issue to the add-on author, using the Copy Debug Info button, and pasting that into the report.
 
 **3. Check your Anki version**
@@ -33,7 +35,7 @@ Sometimes restarting your computer may help.
 
 Crashes and display issues can be caused by the video driver. Changing to a
 different video driver in the preferences screen or via the gldriver file may
-help. Make sure you try all three options.
+help. Make sure you try all three options and restart Anki after each change.
 
 - [Windows](https://docs.ankiweb.net/platform/windows/display-issues.html)
 - [Mac](https://docs.ankiweb.net/platform/mac/display-issues.html)