Texmaker Custom Shortcuts not working

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http://askubuntu.com – Did anybody get custom shortcuts working for Texmaker (using latest version 3.5)? I defined CTRL+SHIFT+A for the \begin{align} environment and removed the shortcut for \textsf{} as it also has assinged CTRL+ALT+A (see Options -> Configure Texmaker -> Shortcuts). However, I cannot make it work. Restarting Texmaker did not help. Thanks for input! n3rd (HowTos)