还是用 29 吧，永不升级

Disable and Prevent Flash Player Update Prompts Forever

Option 1 – Windows Only
Hold the Windows Key and press “ R ” to bring up the “ Run ” dialog box.
Type “ services.msc “, then press “ Enter “.
Double-click the “ Adobe Flash Player Update Service “.
For the “ Startup type “, choose “ Disabled “.
Select “ OK ” and close the “ Services ” window.

Option 2 – Windows, Mac, & Linux
Navigate to the following location depending on your operating system.
32-bit Windows – C:\Windows\System32\Macromed\Flash
64-bit Windows – C:\Windows\SysWow64\Macromed\Flash
Linux – /etc/adobe/
MacOS – /Library/Application Support/Macromedia
Open the “ mms.cfg ” file using a text editor such as Notepad.
Change the line that says “ AutoUpdateDisable=0 ” to “ AutoUpdateDisable=1 “.
Close and save the file. Adobe Flash should no longer prompt for updates.