Can I reinstall a paid app
You can. If an app is misbehaving, the last resort is to uninstall it and then reinstall it which often resolves the problem. Go to the Android Market and click on the ‘My Market Account’ link. You will see an orders tab which should include a list of the apps you have previously purchased. Choose an app and then tap ‘Install’ to complete the process. The Market should not charge you for the reinstall.