关于MATLAB license到期的解决办法
近期MATH WORK公司对广大pj版本用户作了处理，相信很多人打开软件时就会发现如图所示的提醒：
对于MATLAB即将到期或者打开软件时提示“已经过期”的用户，都可以尝试以下方法解决。（博主亲测在MATLAB2012b上可行）
解决办法：
打开MATLAB安装路径下的license文件夹，用写字本打开里面的LIC文件，将以下代代码替换原有的代码，然后保存退出，重启MATLAB。（为了保险起见，现将原来的.lic文件备份一下，以防万一）
A05070F00D1EB1F92326 VENDOR_STRING=QQ=47399897 HOSTID=ANY \
ck=216 SN=888888 TS_OK
INCREMENT Aerospace_Toolbox MLM 99 permanent uncounted \
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VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=207 SN=888888 TS_OK
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50E090D0C130F6416176 VENDOR_STRING=QQ=47399897 HOSTID=ANY \
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C07000703494010EF55C VENDOR_STRING=QQ=47399897 HOSTID=ANY \
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00707080A0CC0D8FB71E VENDOR_STRING=QQ=47399897 HOSTID=ANY \
ck=190 SN=888888 TS_OK
INCREMENT Image_Acquisition_Toolbox MLM 99 permanent uncounted \
50D0D0905C22130C4D2A VENDOR_STRING=QQ=47399897 HOSTID=ANY \
ck=208 SN=888888 TS_OK
INCREMENT Image_Toolbox MLM 99 permanent uncounted \
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ck=133 SN=888888 TS_OK
INCREMENT Instr_Control_Toolbox MLM 99 permanent uncounted \
80C0505033C162F3017F VENDOR_STRING=QQ=47399897 HOSTID=ANY \
ck=169 SN=888888 TS_OK
INCREMENT MAP_Toolbox MLM 99 permanent uncounted C090E0E022BD3BA852B3 \
VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=4 SN=888888 TS_OK
INCREMENT MATLAB_Report_Gen MLM 99 permanent uncounted \
80B000B00052F620FB11 VENDOR_STRING=QQ=47399897 HOSTID=ANY \
ck=190 SN=888888 TS_OK
INCREMENT MATLAB_Distrib_Comp_Engine MLM 99 permanent uncounted \
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INCREMENT MATLAB MLM 99 permanent uncounted 50E0F0D08F6CEF24CC5B \
VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=14 SN=888888 TS_OK
INCREMENT MATLAB_Excel_Builder MLM 99 permanent uncounted \
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ck=206 SN=888888 TS_OK
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VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=198 SN=888888 TS_OK
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VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=203 SN=888888 TS_OK
INCREMENT Neural_Network_Toolbox MLM 99 permanent uncounted \
D0009010451EEB5A283F VENDOR_STRING=QQ=47399897 HOSTID=ANY \
ck=198 SN=888888 TS_OK
INCREMENT OPC_Toolbox MLM 99 permanent uncounted 50F070404BE7E269740A \
VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=198 SN=888888 TS_OK
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ck=152 SN=888888 TS_OK
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VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=166 SN=888888 TS_OK
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ck=216 SN=888888 TS_OK
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VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=190 SN=888888 TS_OK
INCREMENT RF_Blockset MLM 99 permanent uncounted A0A00020B1FED5C15465 \
VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=201 SN=888888 TS_OK
INCREMENT RF_Toolbox MLM 99 permanent uncounted 90F0905068868B4A97C8 \
VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=168 SN=888888 TS_OK
INCREMENT RTW_Embedded_Coder MLM 99 permanent uncounted \
A0D0E0C0B3978D64A1A3 VENDOR_STRING=QQ=47399897 HOSTID=ANY \
ck=250 SN=888888 TS_OK
INCREMENT Real-Time_Win_Target MLM 99 permanent uncounted \
300060D0E68A928A0DBC VENDOR_STRING=QQ=47399897 HOSTID=ANY \
ck=208 SN=888888 TS_OK
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INCREMENT SimBiology MLM 99 permanent uncounted 404080202CFCE52296A3 \
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6020C080F9B2D2F92E1C VENDOR_STRING=QQ=47399897 HOSTID=ANY \
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INCREMENT Simulink_Design_Verifier MLM 99 permanent uncounted \
8080D0002C390CBB546E VENDOR_STRING=QQ=47399897 HOSTID=ANY \
ck=196 SN=888888 TS_OK
INCREMENT Simulink_HDL_Coder MLM 99 permanent uncounted \
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ck=215 SN=888888 TS_OK
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ck=11 SN=888888 TS_OK
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VENDOR_STRING=QQ=47399897 HOSTID=ANY ck=136 SN=888888 TS_OK
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ck=179 SN=888888 TS_OK
参考链接：http://blog.sina.com.cn/s/blog_14df23dce0102x4db.html