Hi! I understand you're facing app crashes and some unusual mouse behavior like the pointer jumping and needing to double-click. Let’s get to the bottom of this together.

To start, could you tell me:
- Which app is crashing? Is it multiple apps or a specific one, like Differences?
- When did these mouse issues begin? Did they start after any recent updates or changes?
- Is your mouse wired or wireless? Are you using the original mouse with your system?

In the meantime, I’ll guide you through some steps to troubleshoot the mouse behavior, since that tends to be a common cause for pointer and clicking troubles:

1. Check Mouse Settings for Double-Click Speed:
- Go to the Windows Start menu > Settings > Devices > Mouse.
- Click on “Additional mouse options” (usually on the right or bottom).
- In the window that opens, under the "Buttons" tab, adjust the double-click speed slider. Try setting it a bit slower and test clicking.

2. Test with Another USB Port:
Sometimes a faulty USB port causes erratic mouse behavior. If using a wired mouse, unplug and try a different USB port. If wireless, try reconnecting the receiver in a different port.

3. Update or Reinstall Mouse Drivers:
- Right-click Start > Device Manager.
- Expand “Mice and other pointing devices.”
- Right-click your mouse device and select “Update driver.”
- If that doesn’t help, try “Uninstall device” then reboot to let Windows reinstall the drivers.

4. Clean the Mouse:
Physical dust or debris around the buttons can cause unintended double-clicks.

5. Check for Software Conflicts:
If the app crashing is related to Differences or any program that interacts with mouse input, try running it in compatibility mode or reinstall the software.

6. Run a System File Check:
Corrupted Windows files could cause both crashes and input issues.
- Type Command Prompt in search, right-click and “Run as administrator.”
- Type sfc /scannow and hit Enter. Let it complete.

Does the mouse misbehavior happen only inside the app that is crashing, or anywhere in Windows?

Once I have more info, we can dive deeper, especially into the app crash issue.

Does this sound good so far? Would you like me to guide you through any particular step now?