How keep Lightroom Classic 9.4 ALONG with 10?

[DavePinMinn]

I upgraded to Lightroom 10 and expected to be allowed to KEEP old versions.  It didn't appear to offer me the option of going into Advanced settings...  Or anything else.

So, I went back and told CC desktop to put 9.4 back on, again expecting to be able to keep both.  Didn't happen.

Yes, I KNOW the catalog was changed.  I'd like to keep 9.4 ON for doing the heavy lifting of culling, which so far, 10.0 is really slow at.  Once done I'll switch to 10 and import the images.

So, HOW do I keep

[JP Hess]

As far as I'm aware, there is no option that allows you to do that. What OS are you using? I'm using Windows 10, and I haven't experienced any change in performance when switching to LrC 10. Have you tried disabling the GPU to see if that makes any difference?

[dj_paige]

As far as I know, this is not possible.

Since some people are having speed issues with 10.0, you might be best off doing all your work in 9.4 until that gets fixed.

[GoldingD]

see: https://helpx.adobe.com/download-install/using/install-previous-version.html

[DavePinMinn]

Windows 10 Pro, 5820 O/C to 4.4 GHz, 32GB memory, 970 GTX graphics, SSDs everywhere but backups, all apps, cache, temp, catalog, and images are on SSDs, most of them on SEPARATE SSDs.

Unfortunately, I'm one of the people that sometimes has performance issues when Adobe puts out a major release.  With 8, IIRC (it may have been 9.0), 8.0 was unusable, then after that it depended.  Some updates were unusable and I'd roll back 'til the next update, and others were fine.  

With 10.0, the place I see the lag MOST is when culling.  At 1:1, with 1:1 previews built, even with the D850, it's NORMALLY very quick from image to image - essentially instantly.  With 10.0, not.  Not even close. BUT, "close" for me is sub-second, which is what I'm used to, so having it take a second or 2 to move from image to image is unusable.  It'd be OK if I had 50 image to go through, but it's usually several hundred.  And WHILE it's doing that, mouse movement is perceptibly laggy.  BUT, since that's what I'm doing MOST right now, that's just where I see it.  Adjustment brushes, spot healing and other htings MAY be equally bad, but I haven't needed them in the last week.

My ACTUAL catalog is now on 10 and the catalog has been updaed.  So, it's too late for that one.  It's not bad enough that I've been willing to go back to 9.4 and import all the new stuff since LR was updated (I ALWAYS keep the old catalogs when Adobe updates to some new version).

But, my "incoming" catalog, which is where I do the culling before importing the "good" images into the real catalog is on 9.4, which is where I'm now doing all the catch-up work.

I've also got PS 21.4 and 22 on, 'cause there are a bunch of things in 22 that are painfully slow...  Object select is slow even drawing the lasso tool around the object (very laggy), brush is equally slow.  I've got graphics turned all the way down to Basic and I still have NO scrubby zoom...

Though my 970 GTX is still on the list of approved and maybe adequate cards, there's a new graphics card on the way that I'm hoping will help fix some of the performance issues - I need it anyway 'cause I've got programs that want an 8GB card, especially for the D850, but hopefully it'll make LR and PS a little better BEFORE the .3 or .4 updates.

[DavePinMinn]

OH, and those instructions for keeping multiple versions, NORMALLY work.  They DON'T appear to work with V10.  It never displays the Advanced Options where you tell it to keep the existing versions.

[johnrellis]

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"those instructions for keeping multiple versions, NORMALLY work.  They DON'T appear to work with V10.  It never displays the Advanced Options where you tell it to keep the existing versions."

Unfortunately, the advanced option to keep the previous version of LR installed disappeared a while ago, at least in LR 9 and perhaps earlier:

It's annoying for those of us who develop plugins and need to test on older versions. I keep a virtual machine with LR 9 in it.

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[johnrellis]

I finally got off my butt and filed a feature request:

https://feedback.photoshop.com/conversations/lightroom-classic/lightroom-allow-multiple-versions-to-... 

I think it's not that likely Adobe will implement it, though. But please add your constructive opinion and be sure to click Like and Follow at the bottom of the first post. That will make it a little more likely that Adobe will consider implementing the feature and you'll be notified when they do.

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[John Waller]

I guess it would help to know why Adobe changed it so only one version can be installed at a time. Acrobat has always been like that but I've no idea if the reasons are the same.

Are plug-in developers and forum regulars a big enough pool of use cases if Adobe has other reasons?

[johnrellis]

"Are plug-in developers and forum regulars a big enough pool of use cases if Adobe has other reasons?"

Very likely not...

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[DavePinMinn]

I thought it might be because it was a major release that required a catalog update.

[johnrellis]

"I thought it might be because it was a major release that required a catalog update."

If you uninstall 10 and install 9.4, you still won't see the advanced options :-<

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[DavePinMinn]

I know...  I had 10 on for about 3 days.  The lag and general slow performance caused me to switch back to 9.4 for the last week.  Unfortunately, I need the "fer real" catalog tomorrow so I just had to tell it to re-install 10.  It's  PITA but 10 is very poor for culling images.

[LoveLunaPhotos]

truly can't even find my images. I hate when updates come out. As much as I don't want to, I might have to switch to LR CC even though I don't think its as intricate. I wish I could help you, but I've tried all the tricks I know and I'm stuck too!