如果升级到最新工具包，可能导致curiosity NANO开发板无法烧录程序。这个时候可以通过简单的退回老版本工具包固件恢复开发板功能
方式，在工程单击右键，找到最后一项工程属性，点进去，按下面的顺序找到工具包版本选择，只要不选下图中最新的即可，确定保存
重新编译烧录
会检测编程器固件版本，并恢复丢失的BOOT
然后进入烧录程序，完成应用程序固件烧录
*****************************************************
Currently loaded versions:
Application version...........1.27.129 (0x01.0x1b.0x81)
Tool pack version .............1.12.711
Entering firmware upgrade mode
Currently loaded versions:
Boot version..................0.0.0 (0x00.0x00.0x00)
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Currently loaded versions:
Application version...........1.27.129 (0x01.0x1b.0x81)
Tool pack version .............1.10.488
Entering firmware upgrade mode
Currently loaded versions:
Boot version..................0.0.0 (0x00.0x00.0x00)
Updating firmware application...
Currently loaded versions:
Application version...........1.25.116 (0x01.0x19.0x74)
Tool pack version .............1.10.488
Target voltage detected
Target device PIC18F16Q41 found.
Device Revision Id = 0xa0050000
Device Id = 0x7560
Calculating memory ranges for operation...
Erasing...
The following memory area(s) will be programmed:
program memory: start address = 0x0, end address = 0xff
program memory: start address = 0x1500, end address = 0x16ff
program memory: start address = 0xff00, end address = 0xffff
configuration memory
Programming complete
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