下载、安装
下载安装包网址，Ubuntu上选择Debian安装包。
https://www.scootersoftware.com/download.php
$ sudo dpkg -i bcompare-4.4.6.27483_amd64.deb
注册
安装完是30天trial version。
注册就是那啥，你懂
修改/usr/lib/beyondcompare/BCompare文件。为了保险，可以先复制备份一下这个文件。
sudo sed -i "s/keexjEP3t4Mue23hrnuPtY4TdcsqNiJL-5174TsUdLmJSIXKfG2NGPwBL6vnRPddT7tH29qpkneX63DO9ECSPE9rzY1zhThHERg8lHM9IBFT+rVuiY823aQJuqzxCKIE1bcDqM4wgW01FH6oCBP1G4ub01xmb4BGSUG6ZrjxWHJyNLyIlGvOhoY2HAYzEtzYGwxFZn2JZ66o4RONkXjX0DF9EzsdUef3UAS+JQ+fCYReLawdjEe6tXCv88GKaaPKWxCeaUL9PejICQgRQOLGOZtZQkLgAelrOtehxz5ANOOqCaJgy2mJLQVLM5SJ9Dli909c5ybvEhVmIC0dc9dWH+/N9KmiLVlKMU7RJqnE+WXEEPI1SgglmfmLc1yVH7dqBb9ehOoKG9UE+HAE1YvH1XX2XVGeEqYUY-Tsk7YBTz0WpSpoYyPgx6Iki5KLtQ5G-aKP9eysnkuOAkrvHU8bLbGtZteGwJarev03PhfCioJL4OSqsmQGEvDbHFEbNl1qJtdwEriR+VNZts9vNNLk7UGfeNwIiqpxjk4Mn09nmSd8FhM4ifvcaIbNCRoMPGl6KU12iseSe+w+1kFsLhX+OhQM8WXcWV10cGqBzQE9OqOLUcg9n0krrR3KrohstS9smTwEx9olyLYppvC0p5i7dAx2deWvM1ZxKNs0BvcXGukR+/g" /usr/lib/beyondcompare/BCompare
启动beyond compare，提示注册码有问题，点击"Enter key"按钮，复制下面的key，确认即可。
GXN1eh9FbDiX1ACdd7XKMV7hL7x0ClBJLUJ-zFfKofjaj2yxE53xauIfkqZ8FoLpcZ0Ux6McTyNmODDSvSIHLYhg1QkTxjCeSCk6ARz0ABJcnUmd3dZYJNWFyJun14rmGByRnVPL49QH+Rs0kjRGKCB-cb8IT4Gf0Ue9WMQ1A6t31MO9jmjoYUeoUmbeAQSofvuK8GN1rLRv7WXfUJ0uyvYlGLqzq1ZoJAJDyo0Kdr4ThF-IXcv2cxVyWVW1SaMq8GFosDEGThnY7C-SgNXW30jqAOgiRjKKRX9RuNeDMFqgP2cuf0NMvyMrMScnM1ZyiAaJJtzbxqN5hZOMClUTE+++