Update LyX with 64-bit installer on Windows

[Yu Jin]

Am Do., 3. Dez. 2020 um 18:39 Uhr schrieb Richard Kimberly Heck <
rikiheck at lyx.org>:

> On 12/3/20 10:56 AM, Yu Jin wrote:
>
> Am Mi., 2. Dez. 2020 um 22:28 Uhr schrieb Richard Kimberly Heck <
> rikiheck at lyx.org>:
>
>> On 12/2/20 3:37 PM, Yu Jin wrote:
>>
>> Am Mi., 2. Dez. 2020 um 20:24 Uhr schrieb <_johnny7_ger at web.de>:
>>
>>> Perfect, thank you for elaborating on this. I suspected something along
>>> these lines but wanted to be sure. It is generally handy to be able to
>>> update so it is good to hear this will still be supported (but I assume
>>> for 2.4 it won't be possible?).
>>>
>> Every major release will have to be installed freshly, meaning into an
>> empty folder. This is not because of the installer itself though, but
>> rather because of LyX. Usually major releases bring new features and get
>> rid of some old stuff, so a fresh "restart" is needed. The installer for
>> 2.4 won't detect your LyX 2.3 because of that. It will also be the same for
>> 2.5 and so on. But once you have a 2.4 installation, every next minor
>> release (2.4.x) will again be able to detect your older 2.4 installation as
>> usual and propose to install over it. This was always the case and will
>> always be the case (well, except for the case of 2.3.6 :)
>>
>> Just to add a little bit to this: I knew the new installer would bring
>> some hiccups. But, since we have had only good reports about it, and since
>> a 64 bit version is especially important, it seemed worth going ahead now.
>>
>> Eugene, will the 2.4.x installer migrate user preferences from 2.3.x
>> (assuming they are found in the most usual place)? It would be very good if
>> it could.
>>
> Not as it is now, it should be no problem to implement though. I can do
> it, will it be enough to copy "preferences" and "session" from old userdir
> to the new one?
>
> I'd just copy over the entire old user directory. The user may have
> templates, layout files, etc, that they'd like to use with the new version.
> We have mechanisms to convert things to the new format as needed. The first
> launch will over-write whatever files need over-writing.
>
> On Linux, the user directory typically does not change between versions.
> So we know this works.
>
Aha... alright, will do. I assume configure.py is also one of those
mechanisms which overwrites files. I will make the installer copy the
directory just before it runs that script then.
-- 
    Eugene
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